Wafer type sealing gate valve

Abstract

The utility model discloses a wafer type sealing gate valve which comprises two valve plates used for forming a valve body, a valve rod and a gate plate, the two valve plates are fixedly connected through a bolt, a lining is further clamped and fixed between the two valve plates, notches and metal clamping pieces are arranged on the two sides of the lining, the thickness of the metal clamping pieces is larger than the depth of the notches, and the gate plate is arranged on the valve rod. The metal clamping piece is further provided with a V-shaped protruding edge. According to the wafer type sealing gate valve, the valve body is composed of the two valve plates and the lining, the gate plate driven by the threaded sliding block is arranged on the outer side of the valve body, and the valve rod is driven by the hand wheel to rotate to drive the gate plate to ascend, descend, open and close to achieve on-off of the valve; the V-shaped protruding edges matched with the flashboard are further arranged in the lining to scrape and clean impurities on the surface of the lining, the sealing performance of the lining is improved through groove face matching, the metal clamping pieces are arranged on the two sides of the lining, and the strength and the sealing performance of the lining are improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to gate valve technical field, concretely relates to a pair of sandwich formula sealing gate valve. BACKGROUND

[0002] The pair of sandwich formula knife-shaped gate valve is widely used in many low-pressure pipeline conveying systems because of its short structure length, light weight, convenient installation and maintenance and many advantages. The structure of the traditional pair of sandwich formula knife-shaped gate valve is disclosed in the national machinery industry standard JB / T8691-1998.

[0003] The existing pair of sandwich formula knife-shaped gate valve is divided into split type and integral type, wherein the split type valve body adopts two split type structures, a knife gate movable cavity is formed in the middle part, the knife-shaped gate seals the valve body under the drive of the driving part, compared with the integral type, the split type gate valve structure is complex, but its service life is longer, and the sealing of the split type gate valve is mainly realized by the cooperation of the embedded sealing bushing and the gate plate. SUMMARY

[0004] In view of the prior art, the purpose of the utility model is to provide a sealing gate valve structure with improved structure and better sealing effect of the gate plate bushing.

[0005] In order to achieve the above purpose, the utility model adopts the technical scheme that a pair of sandwich formula sealing gate valve comprises two valve pieces for constituting a valve body, a valve rod and a gate plate, the two valve pieces are fixedly connected through bolts, and a bushing is also clamped and fixed between the two valve pieces, notches and metal clamping pieces are arranged on both sides of the bushing, the thickness of the metal clamping piece is greater than the depth of the notch, and V-shaped convex edges are further arranged on the metal clamping piece.

[0006] As a further setting of the above scheme, a hand wheel fixed with the valve rod and a rod seat fixed with the valve body are arranged on the valve rod, external threads are arranged on the valve rod, and internal thread blocks are threadedly matched.

[0007] As a further setting of the above scheme, fixing holes are arranged on the internal thread blocks, the gate plate is fixed with the internal thread blocks through screws, and the gate plate is driven to axially move and stretch along the valve rod.

[0008] As a further setting of the above scheme, a cover is further arranged on the valve body, and the cover is fixedly connected on both sides of the valve pieces and the rod seat through bolts.

[0009] As a further setting of the above scheme, a plate groove matched with the gate plate is arranged on the inner side of the bushing, an arc convex edge is arranged in the middle part of the plate groove, and a concave groove opposite to the arc convex edge is arranged on the gate plate.

[0010] Beneficial effects: the double-clip type sealing gate valve of the embodiment is composed of two pieces of valve plates and a bushing, a threaded sliding block driven gate plate is arranged outside the valve body, the gate plate is driven to rise and fall by rotating the valve rod driven by the hand wheel to open and close the gate to realize the on-off of the valve, further, the bushing is further provided with a V-shaped rib matched with the gate plate to scrape and clean the surface of the gate plate, the groove surface is arranged to improve the sealing performance, and metal clamps are arranged on both sides of the bushing to improve the strength and sealing performance. BRIEF DESCRIPTION OF DRAWINGS

[0011] Figure 1 It is a structure schematic view of the double-clip type sealing gate valve.

[0012] Figure 2 It is a structure schematic view of the double-clip type sealing gate valve.

[0013] Figure 3 It is a structure schematic view of the double-clip type sealing gate valve.

[0014] Figure 4 It is a structure schematic view of the double-clip type sealing gate valve.

[0015] The drawings show that: 1, the valve body; 10, the valve plate; 11, the bolt; 2, the valve rod; 20, the rod seat; 21, the hand wheel; 22, the external thread; 23, the internal thread block; 24, the fixed hole; 25, the screw part; 3, the gate plate; 31, the concave groove; 4, the bushing; 41, the slot; 42, the metal clamp; 43, the V-shaped rib; 6, the plate groove; 61, the arc rib; 7, the cover. DETAILED DESCRIPTION

[0016] In order to more clearly understand the above-mentioned purposes, features and advantages of the present application, the present application will be further described in detail below in combination with the drawings and specific embodiments. It should be noted that the embodiments of the present application and the features in the embodiments can be combined with each other without conflict.

[0017] As shown in the drawings, a double-clip type sealing gate valve comprises two pieces of valve plates 10 for constituting a valve body 1, a valve rod 2 and a gate plate 3, the two pieces of valve plates 10 are fixedly connected through bolts 11, and a bushing 4 is also clamped and fixed between the two pieces of valve plates 10, the bushing 4 is provided with a slot 41 and a metal clamp 42 on both sides, the thickness of the metal clamp 42 is greater than the depth of the slot 41, and the metal clamp 42 is further provided with a V-shaped rib 43. Figures 1-4 As a further arrangement of the above-mentioned scheme, the valve rod 2 is provided with a hand wheel 21 fixedly connected with the valve rod 2 and a rod seat 20 fixedly connected with the valve body 1, the valve rod 2 is provided with an external thread 22 and is threadedly matched with an internal thread block 23.

[0018]

[0019] ​As a further arrangement of the above-mentioned scheme, the inner threaded block 23 is provided with a fixing hole 24, and the gate plate 3 is fixed with the inner threaded block 23 through a screw piece 25 and is driven to move along the valve rod 2 axially.

[0020] As a further arrangement of the above-mentioned scheme, the valve body 1 is further provided with a cover 7 which is fixedly connected on both sides of the valve plate 10 and the rod base 20 through a bolt 11.

[0021] As a further arrangement of the above-mentioned scheme, the inner side of the bushing 4 is provided with a plate groove 6 matched with the gate plate 3, the middle part of the plate groove 6 is provided with an arc convex rib 61, and the gate plate 3 is provided with a concave groove 31 opposite to the arc convex rib 61.

[0022] Reference Figures 1-2 The pair of clamping type sealing gate valve of the embodiment is shown, the gate valve of the embodiment is composed of two valve plates 10 which form the valve body 1 structure, a plurality of bolt hole grooves are arranged on the valve plate 10, the bolt 11 is fixedly connected by penetrating, and the bushing 4 is clamped and fixed between the two valve plates 10, the bushing 4 is also connected by penetrating when the bolt 11 penetrates, so that the bushing 4 can be limited, the bushing 4 is provided with a notch 41 and a metal clamping piece 42 is embedded, when the bushing 4 is fixed, the metal clamping piece 42 is pressed to the bushing 4 under the pressure of the valve plate 10, so that the bushing 4 is kept fixed, and the sealing strength of the bushing 4 which is extruded and deformed is higher when the bushing 4 cooperates with the gate plate 3, the metal clamping piece 42 extrudes the bushing 4 when the gate plate 3 is lifted relative to the bushing 4, so that the V-shaped convex rib 43 arranged on the inner side of the bushing 4 is relatively close, the medium on the surface of the gate plate 3 can be scraped when the gate plate 3 is lifted, and the V-shaped convex rib can also avoid that the gate plate 3 brings impurities in the outside into the valve body 1.

[0023] Further, the plate groove 6 for sealing the gate plate 3 is arranged on the bushing 4 of the embodiment, the arc convex rib 61 is arranged on the plate groove 6, the concave groove 31 on the gate plate 3 is matched, and the size of the concave groove 31 is smaller than that of the arc convex rib 61, when the two cooperate to seal the valve body 1, the arc convex rib 61 is extruded into the concave groove 31, and the cooperation sealing strength of the two can be enhanced under the extrusion of the gate plate 3 driven by the valve rod 2.

[0024] Obviously, those skilled in the art can make various modifications and variations to the present application without departing from the spirit and scope of the present application. Thus, if these modifications and variations of the present application belong to the scope of the present application scheme and equivalent technologies, the present application also intends to include these modifications and variations.

Claims

1. A clamp-type seal gate valve, characterized by: The utility model provides a valve body (1) is connected with the valve stem (2) and the valve plate (10) through the bolt (11), and the valve stem (2) is connected with the hand wheel (21) and the stem seat (20) through the bolt (11), and the valve stem (2) is connected with the inner thread block (23) through the external thread (22), and the inner thread block (23) is connected with the gate plate (3) through the screw (25), and the gate plate (3) is connected with the valve plate (10) through the bolt (11).

2. A dual seal gate valve according to claim 1, wherein: The valve stem (2) is provided with a hand wheel (21) fixed with the valve stem (2) and a stem seat (20) fixed with the valve body (1), and the valve stem (2) is provided with an external thread (22) and a threaded inner thread block (23).

3. A dual seal gate valve according to claim 2, wherein: The inner thread block (23) is provided with a fixing hole (24), and the gate plate (3) is fixed with the inner thread block (23) through a screw (25) and is driven to axially move along the valve stem (2).

4. A dual seal gate valve as claimed in claim 2, wherein: The valve body (1) is further provided with a cover (7) fixedly connected to the valve plate (10) and the stem seat (20) through the bolt (11).

5. A dual seal gate valve as claimed in claim 1, wherein: The inner side of the bushing (4) is provided with a plate groove (6) matched with the gate plate (3), and the middle part of the plate groove (6) is provided with an arc convex rib (61), and the gate plate (3) is provided with a concave groove (31) opposite to the arc convex rib (61).

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