Abrasion-resistant pneumatic knife-shaped gate valve

Abstract

The utility model discloses an abrasion-resistant pneumatic knife gate valve, which relates to the technical field of knife gate valves and comprises a valve body and a gate plate. A sealing assembly is further included. The sealing assembly comprises a packing cavity, a packing ring and a pressing assembly, and a wear-resistant ring is fixedly arranged in the packing ring; the packing ring comprises a plurality of groups of ring plates and at least two groups of ring pads, the ring plates are sequentially stacked at the plate ends, the plurality of groups of ring plates are attached in the packing cavity, one group of ring pad is attached and fixed between every two adjacent groups of ring plates, and each ring pad comprises a wear-resistant ring; the utility model has the advantages that the wear-resistant rings in the plurality of groups of ring pads are respectively attached to the flashboard at intervals, better supporting force can be provided for the ring pads so as to improve better structural strength among the plurality of groups of ring pads, and the ring plates can effectively disperse pressure acting on the ring pads so as to reduce rapid wear caused by local stress concentration; and meanwhile, the ring pad which is independently arranged is integrally detachable, so that the wear-resistant ring can be conveniently replaced after being worn, and the continuous use of the ring plate is not influenced.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of knife gate valve, more specifically to a kind of wear-resistant pneumatic knife gate valve. BACKGROUND

[0002] Knife gate valve, also known as knife gate valve or knife door valve, is a kind of valve for controlling fluid flow, its main feature is a blade-shaped gate, which can be moved vertically to open or close the channel in the direction of fluid flow;

[0003] The existing knife gate valve, as shown in the publication number: CN206449222U, a valve seat packing integrated knife gate valve, when the valve plate is opened and closed, it needs to be pressed tightly on the auxiliary packing to provide sealing, but the auxiliary packing is directly placed in the packing area for lamination, and the force of lamination valve plate is relatively concentrated, and there is a large wear defect. UTILITY MODEL CONTENT

[0004] The utility model discloses a kind of wear-resistant pneumatic knife gate valve to solve the above technical problems.

[0005] The utility model discloses the following technical solutions to realize the above-mentioned purposes specifically:

[0006] The utility model provides a kind of wear-resistant pneumatic knife gate valve, including valve body and the gate plate movable on valve body, the gate pass of being provided with for gate plate movement is set on valve body, fluid passage is equipped in valve body, gate pass is connected with valve body outside and fluid passage;

[0007] It further includes sealing assembly fixed between gate pass and gate plate, for sealing and cutting off the communication between valve body outside and fluid passage of gate pass;

[0008] Sealing assembly includes packing cavity provided on valve body, packing ring laminated in packing cavity, and compression assembly fixed on valve body for laminating and stabilizing packing ring, wear-resistant ring is fixed in packing ring, and wear-resistant ring is laminated around gate plate outside.

[0009] The packing ring includes a plurality of ring plates and at least two groups of ring pads, the plurality of ring plates are laminated in the packing cavity, and each adjacent two groups of ring plates are fixed with a group of ring pads between them, and the ring pad includes a wear-resistant ring.

[0010] As a preferred technical solution of the utility model, the compression assembly includes a compression ring laminated with the ring plate, and a plurality of fixing members for fixing the valve body and the compression ring to provide stable lamination of the compression ring on the ring plate, and the compression ring is arranged outside the gate plate.

[0011] As a preferred technical solution of the utility model, the fixing member is provided with a plurality of groups.

[0012] As a preferred technical scheme of the utility model, the ring plate comprises a plate body and a sealing layer fixedly attached to the plate body, and a gap is formed between the sealing layer and the gate plate.

[0013] As a preferred technical scheme of the utility model, the ring pad comprises a pressing pad, a closed loop fixedly attached to the inner side of the pressing pad, a snap ring fixedly attached to the opposite ends of the pressing pad, and a clamping groove for the snap ring, and the closed loop is a wear-resistant ring.

[0014] As a preferred technical scheme of the utility model, the utility model further comprises a bracket fixedly attached to the valve body, an actuator fixedly attached to the bracket, and a connecting rod fixedly attached between the output end of the actuator and the gate plate.

[0015] The utility model has the following advantages:

[0016] The multiple ring plates in the packing ring are stacked from bottom to top, and a ring pad is arranged between every two ring plates. The wear-resistant rings in the multiple ring pads are separately attached to the gate plate in a spaced manner, which can provide better support for the ring pad to improve the structural strength between the multiple ring pads. The ring plate can effectively disperse the pressure acting on the ring pad to reduce rapid wear caused by local stress concentration. Meanwhile, the separately arranged ring pad is detachable, and the wear-resistant ring can be easily replaced after wear without affecting the use of the ring plate. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 is a structural schematic view of the utility model.

[0018] Reference signs: valve body 1, gate plate 2, sealing assembly 3, bracket 4, actuator 5, connecting rod 6, packing cavity 31, packing ring 32, pressing assembly 33, ring plate 321, ring pad 322, pressing ring 331, fixing member 332, plate body 3211, sealing layer 3212, pressing pad 3221, closed loop 3222, snap ring 3223, clamping groove 3224. DETAILED DESCRIPTION

[0019] As shown in Figure 1 The utility model provides: a kind of wear-resistant pneumatic knife type gate valve, including valve body 1 and the gate plate 2 in the activity on valve body 1, valve body 1 is equipped with the gate plate 2 activity's gate, and valve body 1 is equipped with fluid passage, gate is connected with valve body 1 outside and fluid passage, fluid passage is connected with the left and right sides of valve body 1, gate is connected in valve body 1 top end into fluid passage, and gate plate 2 is in the activity in gate and is inserted into fluid passage;

[0020] Further comprising a bracket 4 fixed on the valve body 1, an actuator 5 fixed on the bracket 4, and a connecting rod 6 fixed between the output end of the actuator 5 and the outside of the gate plate 2, the actuator 5 can also be a cylinder, etc., and the actuator 5 is operated to drive the connecting rod 6 to move up and down, thereby driving the gate plate 2 to move up and down;

[0021] Further comprising a sealing assembly 3 fixed between the gate and the gate plate 2, which is used to close the communication between the outside of the valve body 1 and the fluid passage, and is arranged between the upper side of the gate and the gate plate 2, thereby providing a closed barrier to the fluid passage when the gate plate 2 moves in the gate;

[0022] The sealing assembly 3 comprises a packing cavity 31 arranged on the valve body 1, a packing ring 32 arranged in the packing cavity 31, and a compression assembly 33 fixed on the valve body 1 for stably fixing the packing ring 32, the packing ring 32 is fixedly arranged in the packing cavity 31, the packing ring 32 is arranged on the gate plate 2, and the packing ring 32 is embedded in the packing cavity 31 at the top end of the gate, the packing ring 32 is arranged in the packing cavity 31, and the packing ring 32 on the gate plate 2 is tightly closed, and the compression assembly 33 stably fixes the packing ring 32 arranged in the packing cavity 31, thereby ensuring the stability of the packing ring 32 tightly closing the gate plate 2;

[0023] The specific structure of the compression assembly 33 is as follows:

[0024] The compression assembly 33 comprises a compression ring 331 arranged on the ring plate 321, and a plurality of fixing members 332 for fixing the valve body 1 and the compression ring 331 to provide stable arrangement of the compression ring 331 on the ring plate 321, the compression ring 331 is arranged around the gate plate 2, the bottom end of the compression ring 331 is arranged on the top end of the uppermost ring plate 321 of the plurality of ring plates 321, thereby applying downward pressure to the sealing assembly 3 to compress the sealing assembly 3 in the packing cavity 31, and the fixing members 332 are connected to the compressed ring plate 321 and the valve body 1;

[0025] The fixing members 332 are provided in multiple groups to improve the stability of the fixing, and the fixing members 332 can be bolts which are screwed into the valve body 1 through the ring plate 321 to be detachably fixed.

[0026] The packing ring 32 comprises a plurality of ring plates 321 and at least two ring pads 322 which are sequentially stacked at the plate end, the plurality of ring plates 321 are arranged in the packing cavity 31, and each adjacent two ring plates 321 are fixedly arranged with a ring pad 322, the ring pad 322 comprises a wear-resistant ring, and the material of the ring pad 322 is fluorine rubber, etc., which can provide better elasticity and wear resistance;

[0027] The packing ring 32 is arranged in multiple sets of ring plates 321 stacked from bottom to top, and a set of ring pads 322 is set between every two sets of ring plates 321. The wear-resistant rings in the multiple sets of ring pads 322 are respectively and spaced together on the gate plate 2, which can provide better support for the ring pads 322 to improve the structural strength between the multiple sets of ring pads 322. The ring plates 321 can effectively disperse the pressure acting on the ring pads 322 to reduce rapid wear caused by local stress concentration.

[0028] Meanwhile, the separately designed ring gasket 322 is detachable, allowing for easy replacement after the wear ring wears out, without affecting the continued use of the ring plate 321.

[0029] The specific structures of the aforementioned ring plate 321 and clamping assembly 33 are shown below:

[0030] The ring plate 321 includes a plate body 3211 and a sealing layer 3212 that is attached and fixed to the outside of the plate body 3211. There is a gap between the sealing layer 3212 and the gate plate 2. The sealing layer 3212 is made of fluororubber to provide better elasticity and weather resistance.

[0031] The ring gasket 322 includes a pressure pad 3221, a closed ring 3222 fixed inside the pressure pad 3221, a retaining ring 3223 fixed to the two opposite ends of the pressure pad 3221, and a retaining groove 3224 for the retaining ring 3223 to be inserted and fitted. The closed ring 3222 is a wear-resistant ring. The two opposite ends of the pressure pad 3221 are respectively fitted with a sealing layer 3212. The retaining groove 3224 is provided on the plate 3211. The retaining ring 3223 is inserted into the retaining groove 3224, which can be used for positioning and assembly to improve the overall structural balance and facilitate operation.

[0032] And such as Figure 1 As shown, the side of the retaining ring 3223 away from the pressure pad 3221 is larger than the other side, and the retaining groove 3224 also has this structure. When the retaining ring 3223 is inserted into the retaining groove 3224, it can provide a tight fit to improve connection stability.

[0033] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. It will be apparent to those skilled in the art that this utility model is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or basic characteristics of this utility model. Therefore, the embodiments should be considered exemplary and non-limiting in all respects. The scope of this utility model is defined by the appended claims rather than the foregoing description, and thus all variations falling within the meaning and scope of equivalents of the claims are intended to be included within this utility model. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0034] Furthermore, it should be understood that although the specification is described in terms of embodiments, not every embodiment includes every feature described. The specification can include implicit combinations of explicitly mentioned features and / or explicit combinations of implicitely mentioned features. Each embodiment depends on the explicit combinations of features and / or the implicit combinations of features made specifically within that embodiment, and each such embodiment can be combined with every other such embodiment to create further embodiments.

Claims

1. A wear-resistant pneumatic knife gate valve, comprising a valve body (1) and a gate plate (2) movably arranged on the valve body (1), the valve body (1) is provided with a gate channel for the movement of the gate plate (2), and the valve body (1) is provided with a fluid passage, and the gate channel is connected with the outside of the valve body (1) and the fluid passage; Further comprising a sealing assembly (3) fixed between the gate channel and the gate plate (2), used for sealingly cutting off the connection between the gate channel and the fluid passage of the valve body (1); The sealing assembly (3) comprises a packing chamber (31) arranged on the valve body (1), a packing ring (32) arranged in the packing chamber (31), and a pressing assembly (33) fixed on the valve body (1) for stably pressing the packing ring (32), and a wear-resistant ring is fixedly arranged in the packing ring (32) and arranged around the gate plate (2); characterized in that The packing ring (32) comprises a plurality of ring plates (321) stacked in sequence at the plate end and at least two ring pads (322), the plurality of ring plates (321) are arranged in the packing chamber (31), and each adjacent two ring plates (321) are fixedly arranged with a ring pad (322), and the ring pad (322) comprises a wear-resistant ring.

2. A wear resistant pneumatic knife gate valve according to claim 1, characterized in that The pressing assembly (33) comprises a pressing ring (331) arranged around the ring plate (321), and a plurality of fixing members (332) for fixing the valve body (1) and the pressing ring (331) to provide stable pressing of the pressing ring (331) on the ring plate (321), and the pressing ring (331) is arranged around the gate plate (2).

3. A wear resistant pneumatic knife gate valve according to claim 2, wherein, The fixing member (332) is provided with a plurality of groups.

4. A wear resistant pneumatic knife gate valve as defined in claim 1, wherein, The ring plate (321) comprises a plate body (3211) and a sealing layer (3212) fixedly arranged outside the plate body (3211), and the sealing layer (3212) has a spacing with the gate plate (2).

5. A wear resistant pneumatic knife gate valve according to claim 4, wherein, The ring pad (322) comprises a pressing pad (3221), a closed ring (3222) fixedly arranged inside the pressing pad (3221), a clamping ring (3223) fixedly arranged at opposite ends of the pressing pad (3221), and a clamping groove (3224) for the clamping ring (3223) to be arranged and fixed, and the closed ring (3222) is a wear-resistant ring, the opposite ends of the pressing pad (3221) are fixedly arranged with the sealing layer (3212), and the clamping groove (3224) is arranged on the plate body (3211).

6. A wear resistant pneumatic knife gate valve as defined in claim 1, wherein, Further comprising a support (4) fixedly arranged on the valve body (1), an actuator (5) fixedly arranged on the support (4), and a connecting rod (6) fixedly arranged between the output end of the actuator (5) and the outside of the gate plate (2).

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