High-pressure large-diameter wedge type sealing gate valve

Abstract

The utility model relates to the technical field of wedge-type sealing gate valves, in particular to a high-pressure large-caliber wedge-type sealing gate valve which comprises a valve body, flanges fixed on two sides of the valve body, a valve cover arranged at the top end of the valve body, a valve rod arranged in the middle of the valve cover, a polished rod arranged at the bottom end of the valve rod and fixedly connected with a valve clack through a connecting piece, a positioning ring is fixed to the bottom end of the polished rod, a protruding column is fixed to the middle of the bottom end of the positioning ring, a middle groove is formed in the top end of the valve clack, side grooves are formed in the side walls of the two ends of the valve clack, the connecting piece comprises two sets of side blocks, and top round holes are formed in the top ends of the two sets of side blocks. Therefore, when the valve clack is worn after being used for a long time, the two groups of side block structures can be detached from the valve clack by detaching the connecting pin shaft, so that the connection between the valve clack and the valve rod is canceled, and a user can quickly replace the valve clack.

Description

Technical Field

[0001] The utility model relates to the technical field of wedge-type sealing gate valves, in particular to a high-pressure large-diameter wedge-type sealing gate valve. Background Art

[0002] The gate valve's opening and closing parts are gates, and the gate's movement direction is perpendicular to the fluid direction. The gate valve can only be fully opened or fully closed, and cannot be adjusted or throttled. The gate valve is generally composed of a valve body, a valve seat, a gate, a valve stem, and a transmission mechanism. The gate adopts a double gate structure symmetrically connected on both sides of the valve stem.

[0003] During the use of existing gate valves, the gate plate and the valve seat sealing surface are severely worn, which increases the sealing performance and service life. Moreover, the gate plate is usually a plate-like structure. When wear occurs and affects normal use, the entire gate plate can only be replaced, and disassembly is inconvenient. The entire gate valve is discarded due to the wear of the gate plate, resulting in waste. Utility Model Content

[0004] Technical issues solved:

[0005] In view of the above-mentioned shortcomings of the prior art, the utility model provides a high-pressure large-diameter wedge-type sealing gate valve, which can effectively solve the problems in the prior art that the gate plate is inconvenient to replace and disassemble, or the entire gate valve is discarded, causing waste.

[0006] In order to achieve the above objectives, the present invention is implemented through the following technical solutions:

[0007] The utility model provides a high-pressure large-caliber wedge-type sealing gate valve, comprising a valve body, flanges are fixed on both sides of the valve body, a valve cover is arranged at the top end of the valve body, a valve stem is arranged in the middle of the valve cover, the bottom end of the valve stem is fixedly connected to the valve disc through a connecting piece, a polished rod is arranged at the bottom end of the valve stem, a positioning ring is fixed at the bottom end of the polished rod, a raised column is fixed in the middle of the bottom end of the positioning ring, a middle groove is provided at the top end of the valve disc, side grooves are provided at the side walls of both ends of the valve disc, the connecting piece comprises two groups of side blocks, top circular holes are provided at the top ends of the two groups of side blocks, inner circular holes are provided in the middle, the inner circular holes and the top circular holes are connected to each other, the inner circular holes are sleeved on the outer side of the positioning ring, the top circular holes are sleeved on the outer side of the polished rod, and the two groups of side blocks are fixedly connected by connecting pins and nuts.

[0008] Furthermore, convex plates are fixed on both ends of the inner side wall of the valve body, and the convex plates are clamped and fixed in the side grooves.

[0009] Furthermore, each group of the side blocks is a convex structure, and the shape and size of the side blocks are matched with the size of the middle groove.

[0010] Furthermore, a plurality of docking holes are provided on both sides of each group of the side blocks, and an outer circular hole structure is provided at the bottom end of the inner circular hole, and the size of the outer circular hole is adapted to the size of the raised column.

[0011] Furthermore, the outer diameter of the positioning ring is larger than the outer diameter of the polished rod.

[0012] Furthermore, the valve flap is a trapezoidal structure that is larger at the top and smaller at the bottom.

[0013] Compared with the known public technology, the technical solution provided by the utility model has the following beneficial effects:

[0014] The utility model is connected and fixed to the valve disc through a connecting piece, and the connecting piece is a two-group side block structure, which clamps the light rod and the positioning ring at the bottom end of the valve stem and is fixedly connected by a connecting pin shaft and a nut, and is sleeved and fixed between the raised column and the outer circular hole, and the connecting piece structure is movably arranged in the middle groove, and when the valve stem at the top is rotated, the valve disc at the bottom can move vertically up and down accordingly, and the side groove on one side of the valve disc can move under the restriction of the convex plate to avoid offset.

[0015] In this case, the valve stem and the valve disc are connected and fixed by using connecting parts. Therefore, when the valve disc is worn out after long-term use, the two sets of side block structures can be removed from the valve disc by removing the connecting pin shaft, thereby canceling the connection between the valve disc and the valve stem, and the user can quickly replace the valve disc. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the prior art descriptions are briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model, and for ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0017] Figure 1 It is a schematic diagram of the structure of the utility model;

[0018] Figure 2 This is the structural front view of the utility model;

[0019] Figure 3 It is a cross-sectional view of the structure in the utility model;

[0020] Figure 4 It is a structural schematic diagram of the valve disc, the connecting piece and the valve stem in the utility model;

[0021] Figure 5 for Figure 4 One of the structural decomposition diagrams;

[0022] Figure 6 for Figure 4 The second diagram of the structural decomposition.

[0023] The numbers in the figure represent: 1, valve body; 11, convex plate; 2, flange; 3, valve cover; 4, valve stem; 41, bare rod; 42, positioning ring; 43, raised column; 5, valve disc; 51, side groove; 52, middle groove; 6, connecting piece; 61, side block; 62, connecting pin; 63, top round hole; 64, docking hole; 65, inner round hole. DETAILED DESCRIPTION

[0024] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all of the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0025] The utility model is further described below in conjunction with embodiments.

[0026] Example: High-pressure large-diameter wedge-type sealing gate valve, refer to the attached Figure 1 -Attached Figure 6 , comprising a valve body 1, flanges 2 are fixed on both sides of the valve body 1, a valve cover 3 is arranged at the top of the valve body 1, a valve stem 4 is arranged in the middle of the valve cover 3, the bottom end of the valve stem 4 is fixedly connected to the valve disc 5 through a connecting piece 6, a polished rod 41 is arranged at the bottom end of the valve stem 4, a positioning ring 42 is fixed at the bottom end of the polished rod 41, a raised column 43 is fixed in the middle of the bottom end of the positioning ring 42, a middle groove 52 is opened at the top of the valve disc 5, and side grooves 51 are opened on the side walls of both ends of the valve disc 5, the connecting piece 6 comprises two groups of side blocks 61, the top ends of the two groups of side blocks 61 are opened with top circular holes 63, and the middle parts are opened with inner circular holes 65, the inner circular holes 65 and the top circular holes 63 are communicated with each other, the inner circular holes 65 are sleeved on the outer side of the positioning ring 42, the top circular holes 63 are sleeved on the outer side of the polished rod 41, and the two groups of side blocks 61 are fixedly connected by connecting pins 62 and nuts;

[0027] Both ends of the inner wall of the valve body 1 are fixed with convex plates 11 , and the convex plates 11 are clamped and fixed in the side grooves 51 .

[0028] Each set of the side blocks 61 is a convex structure, and the shape and size of the side blocks 61 are compatible with the size of the middle groove 52; the valve stem 4 and the valve flap 5 are connected and fixed by using a connecting piece 6, so when the valve flap 5 is worn out after long-term use, the two sets of side blocks 61 can be removed from the valve flap 5 by removing the connecting pin 62, thereby canceling the connection between the valve flap 5 and the valve stem 4, and the user can quickly replace the valve flap 5.

[0029] A plurality of docking holes 64 are provided on both sides of each group of the side blocks 61, and an outer circular hole structure is provided at the bottom end of the inner circular hole 65, and the size of the outer circular hole is adapted to the size of the raised column 43; the outer diameter of the positioning ring 42 is larger than the outer diameter of the light rod 41; the valve flap 5 is a trapezoidal structure with a larger upper portion and a smaller lower portion; it is connected and fixed to the valve flap 5 through a connecting member 6, and the connecting member 6 is a structure of two groups of side blocks 61, which clamps the light rod 41 and the positioning ring 42 at the bottom of the valve stem 4, and is fixedly connected through a connecting pin 62 and a nut, and is fixedly sleeved between the raised column 43 and the outer circular hole, and the connecting member 6 structure is movably arranged in the middle groove 52, and when the valve stem 4 at the top rotates, the valve flap 5 at the bottom can move vertically up and down accordingly, and the side groove 51 on one side of the valve flap 5 can move under the restriction of the convex plate 11 to avoid offset.

[0030] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some of the technical features therein by equivalents. These modifications or replacements will not cause the essence of the corresponding technical solutions to deviate from the protection scope of the technical solutions of the embodiments of the present invention.

Claims

1. High-pressure large-diameter wedge-type sealing gate valve, characterized by: The valve body (1) comprises a valve body (1), flanges (2) are fixed on both sides of the valve body (1), a valve cover (3) is arranged at the top end of the valve body (1), a valve stem (4) is arranged in the middle of the valve cover (3), the bottom end of the valve stem (4) is fixedly connected to a valve flap (5) via a connecting piece (6), a light rod (41) is arranged at the bottom end of the valve stem (4), a positioning ring (42) is fixed at the bottom end of the light rod (41), a raised column (43) is fixed in the middle of the bottom end of the positioning ring (42), and a middle groove (52) is provided at the top end of the valve flap (5). Side grooves (51) are formed on the side walls at both ends of the valve flap (5). The connecting member (6) includes two groups of side blocks (61). The top ends of the two groups of side blocks (61) are formed with top circular holes (63), and the middle portions are formed with inner circular holes (65). The inner circular holes (65) and the top circular holes (63) are communicated with each other. The inner circular holes (65) are sleeved on the outside of the positioning ring (42), and the top circular holes (63) are sleeved on the outside of the polished rod (41). The two groups of side blocks (61) are fixedly connected by connecting pins (62) and nuts.

2. The high-pressure large-diameter wedge-type sealing gate valve according to claim 1 is characterized in that: Both ends of the inner wall of the valve body (1) are fixed with convex plates (11), and the convex plates (11) are clamped and fixed in the side grooves (51).

3. The high-pressure large-diameter wedge-type sealing gate valve according to claim 1, characterized in that: Each group of the side blocks (61) is a convex-shaped structure, and the shape and size of the side blocks (61) are compatible with the size of the middle groove (52).

4. The high-pressure large-diameter wedge-type sealing gate valve according to claim 1, characterized in that: A plurality of docking holes (64) are provided on both sides of each group of the side blocks (61), and an outer circular hole structure is provided at the bottom end of the inner circular hole (65), the size of the outer circular hole being compatible with the size of the protruding column (43).

5. The high-pressure large-diameter wedge-type sealing gate valve according to claim 4, characterized in that: The outer diameter of the positioning ring (42) is greater than the outer diameter of the polished rod (41).

6. The high-pressure large-diameter wedge-type sealing gate valve according to claim 1, characterized in that: The valve flap (5) is a trapezoidal structure that is larger at the top and smaller at the bottom.

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