Wear-resistant knife-shaped gate valve with high sealing performance

Abstract

The utility model discloses a wear-resistant knife type gate valve with high sealing performance, which comprises a valve body and a valve plate, the interior of the valve body is of a hollow structure, and the valve plate is inserted into the valve body. The valve seat mechanism is used for forming a detachable valve seat structure, the sealing mechanism is used for conducting composite sealing on the valve body and the valve plate, the adjusting mechanism is used for adjusting the valve plate, the valve seat mechanism is assembled on the inner side of the valve body, and the sealing mechanism is arranged between the valve body and the valve plate. The valve has the advantages that the structure is simple, the valve seat mechanism is arranged, the valve seat structure is detachably connected with the valve body, the valve seat structure can be disassembled, assembled and replaced according to actual conditions, the sealing mechanism is arranged, a composite sealing structure is formed through matching of soft sealing and hard sealing, and therefore the sealing performance of the valve is improved. The sealing performance between the valve body and the valve plate can be effectively improved, the adjusting mechanism is arranged and detachably connected with the valve body through a bolt, and a support structure of the adjusting mechanism can be independently replaced.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of knife gate valve, especially to a high sealing wear -resisting knife gate valve. BACKGROUND

[0002] In the prior art, the knife gate valve is also called the knife door gate valve, and the knife type slurry valve. The opening and closing part of the knife gate valve is a gate plate. The movement direction of the gate plate is perpendicular to the fluid direction. The knife gate valve mainly serves as a regulating and intercepting device and is applied to pipelines of water supply, sewage, construction, petroleum, chemical industry, food, medicine, light textile, power, ship, metallurgy and energy system. The knife gate valve is improved on the basis of the ordinary gate valve by changing the flat plate valve plate into a knife type valve plate. According to the thread position of the valve rod, the knife gate valve can be divided into two types, i.e. the open rod knife gate valve and the hidden rod knife gate valve. The knife gate valve solves the problems of large flow resistance, large weight, difficult installation, large occupied area and the like of the ordinary gate valve, flat plate gate valve, ball valve, stop valve, regulating valve and butterfly valve by virtue of the advantages of small size, small flow resistance, light weight, easy installation and easy disassembly. However, the knife gate valves sold on the market are prone to generating vortex when the medium passes through, which causes damage to the valve. Long-term use can easily cause leakage. During the relative movement of the valve rod and the valve body, the valve rod and the valve body are prone to damage. If any of them is damaged, the valve cannot be used, which causes waste of resources. In addition, the valve plate and the valve body of the existing knife gate valve usually adopt soft sealing or hard sealing. The single sealing structure has poor sealing performance, which leads to poor sealing of the knife gate valve and easy leakage during long-term use.

[0003] The utility model discloses a kind of wear-resistant high sealing knife gate valves with application No. 202120873789.7, including valve body, the inner side of the valve body is equipped with second sealing ring, the inner side of the second sealing ring is equipped with first sealing ring, the inner side of the second sealing ring and first sealing ring is provided with support ring, the side of the first sealing ring is equipped with gate plate main body, the inner wall of the valve body is provided with two limit head in the side of the gate plate main body, the outer side of the upper end of the gate plate main body is slidably connected with sealing plate, the upper end surface of the sealing plate is equipped with gate plate guide plate, the upper end surface of the gate plate main body is fixedly installed with connecting seat, the outer side of the connecting seat is equipped with limit cover, the upper end surface of the connecting seat is slidably connected with connecting rod, the outer side of the upper end of the connecting rod is equipped with adjusting handle.However, the structure of this kind of wear-resistant high sealing knife gate valve is relatively complex, it can only adjust the knife gate valve, but the valve seat of the gate valve cannot be replaced, so that the whole gate valve will be scrapped when a part of the knife gate valve is damaged, the economic benefit is low, and the sealing form of hard sealing is used, the sealing performance is poor, leading to poor sealing of the knife gate valve, and easy leakage during long-term use. UTILITY MODEL CONTENTS

[0004] The utility model discloses a high sealing resistance to wear knife type gate valve.

[0005] To realize above-mentioned purpose, the technical scheme that the utility model provides is:

[0006] A high sealing resistance to wear knife type gate valve, including valve body and valve plate, the inside of valve body is hollow structure, the valve plate is inserted in the inside of valve body, still include the valve seat mechanism for constituting detachable valve seat structure, the sealing mechanism for to valve body with the valve plate is compound sealed and the adjusting mechanism for to the valve plate is adjusted, and valve seat mechanism is assembled in the inside of valve body, and sealing mechanism is arranged between valve body with the valve plate, and adjusting mechanism is arranged in the upper end of valve body.

[0007] Valve seat mechanism includes hard sealing valve seat and stainless steel cover, the inside one side of valve body is provided with the hard sealing valve seat and is attached with the inner wall of valve body, the inside of valve body is provided with the stainless steel cover away from the hard sealing valve seat one side and is attached with the inner wall of valve body, the hard sealing valve seat and the stainless steel cover are located at the both sides of valve plate respectively.

[0008] The hard sealing valve seat is made of alloy steel material, and the diameter of the stainless steel cover is greater than that of the hard sealing valve seat.

[0009] Sealing mechanism includes stopper and soft sealing assembly, the stopper is provided with two groups, and the two groups of stoppers are respectively arranged at the upper and lower ends of the stainless steel cover inside and are fixedly connected with the stainless steel cover, the stopper is arranged on the side of the stainless steel cover close to the valve plate and is attached with the valve plate, and the soft sealing assembly is arranged at the connection between the valve body and the valve plate and is arranged on the same side of the hard sealing valve seat.

[0010] The soft sealing assembly includes a sealing groove and a sealing rubber ring. The sealing groove is arranged inside the valve body close to the hard sealing valve seat. The sealing groove is annular inverted trapezoidal structure. The sealing rubber ring is arranged inside the sealing groove and is embedded in the valve body through the sealing groove.

[0011] The sealing rubber ring is annular V-shaped rubber ring structure. The side of the sealing rubber ring close to the valve plate is set as round corner structure and part of the sealing rubber ring protrudes from the sealing groove. The part of the sealing rubber ring protruding from the sealing groove is attached with the valve plate. The side of the sealing rubber ring close to the valve body is set as concave structure and the side of the sealing rubber ring is shaped with the side wall of the sealing groove.

[0012] The adjusting mechanism comprises an adjusting support, an adjusting nut and an adjusting valve rod, the adjusting support is arranged at the upper end of the valve body and is fixedly connected with the valve body through a bolt, the adjusting nut is arranged at the inner side of the upper end of the adjusting support and is rotationally connected with the adjusting support, the adjusting valve rod is arranged at the inner side of the adjusting nut and is threadedly connected with the adjusting nut, the lower end of the adjusting valve rod is connected with the upper end of the valve plate through a connecting head, and the adjusting valve rod is located at the inner side of the adjusting support.

[0013] The valve cover is arranged at the upper end of the valve body and is inserted with the valve body, the valve plate penetrates the valve cover, and the packing seal is arranged between the valve cover and the valve body and is arranged in close contact with the valve cover and the valve body.

[0014] The hand wheel is assembled at the upper part of the adjusting nut and is fixedly connected with the adjusting nut, the pressure bearing is arranged between the adjusting support and the hand wheel and is sleeved with the adjusting nut, and the hand wheel is connected with the adjusting support through the pressure bearing.

[0015] The oil injection nozzle is arranged at the upper part of the adjusting support corresponding to the adjusting nut and penetrates the adjusting support.

[0016] The utility model discloses beneficial effect is:

[0017] Simple structure is provided with valve seat mechanism, and the valve seat mechanism is detachably connected with the valve body, the valve seat mechanism can be disassembled and replaced according to actual conditions, the sealing mechanism is provided, the composite sealing structure is formed by the cooperation of soft sealing and hard sealing, the sealing property between the valve body and the valve plate can be effectively improved, the leakage phenomenon of the knife gate valve is avoided, in addition, the valve body passageway and the sealing interface are vertically arranged, when medium passes, vortex is not easy to generate, the durability and service life of the valve can be improved, the adjusting mechanism is provided, and the bracket structure can be replaced independently by detachable connection with the valve body through the bolt, and the economic benefit is high. ACCURACY OF DRAWINGS

[0018] Figure 1 It is the overall structure schematic diagram of the utility model;

[0019] Figure 2 It is the local section view of the sealing mechanism and the valve body cooperation under the closed state of the utility model;

[0020] Figure 3 It is the knife gate valve structure schematic diagram under the open state of the utility model;

[0021] Figure 4 It is the local section view of the sealing mechanism and the valve body cooperation under the open state of the utility model.

[0022] Fig. 1, valve body; 2, valve plate; 3, hard sealing valve seat; 4, stainless steel sleeve; 5, stop block; 6, sealing groove; 7, sealing rubber ring; 8, adjusting support; 9, adjusting nut; 10, adjusting valve rod; 11, valve cover; 12, packing seal; 13, hand wheel; 14, pressure bearing; 15, oil injection nozzle. DETAILED DESCRIPTION

[0023] The utility model will be described in further detail below with reference to the drawings,

[0024] A high sealing wear-resistant knife type gate valve, including valve body 1 and valve plate 2, the inside of valve body 1 is hollow structure, valve plate 2 is inserted in the inside of valve body 1, still include the valve seat mechanism for constituting detachable valve seat structure, the sealing mechanism for the composite sealing of valve body 1 and valve plate 2 and the adjusting mechanism for adjusting valve plate 2, valve seat mechanism is assembled in the inside of valve body 1, sealing mechanism is arranged between valve body 1 and valve plate 2, adjusting mechanism is configured at the upper end of valve body 1, the overall structure schematic diagram of the utility model is as shown in Figure 1 .

[0025] Valve seat mechanism includes hard sealing valve seat 3 and stainless steel sleeve 4, hard sealing valve seat 3 is set at the inside one side of valve body 1 and is set in place with the inner wall of valve body 1, stainless steel sleeve 4 is set at the inside of valve body 1 and is set in place with the inner wall of valve body 1 away from hard sealing valve seat 3, hard sealing valve seat 3 and stainless steel sleeve 4 are located at the both sides of valve plate 2 respectively, valve seat mechanism is matched by hard sealing valve seat 3 and stainless steel sleeve 4, constitutes the detachable valve seat structure of knife type gate valve, wherein, hard sealing valve seat 3 is used as the main body of detachable valve seat structure, hard sealing valve seat 3 can be removed from valve body 1 to replace, stainless steel sleeve 4 is used to constitute the detachable valve seat structure of knife type gate valve with hard sealing valve seat 3 and provides installation support for stop block 5.

[0026] Hard sealing valve seat 3 is made of alloy steel material, and the diameter of the stainless steel sleeve 4 is greater than the diameter of the hard sealing valve seat 3. The hard sealing valve seat 3 made of alloy steel material can ensure the strength and durability of the knife type gate valve. The diameter of the stainless steel sleeve 4 is greater than the diameter of the hard sealing valve seat 3, which can ensure that the diameter of the valve body 1 and the sealing interface are perpendicular. When the medium passes through, vortex is not easy to produce, the valve is not easy to damage, and the service life is longer.

[0027] The sealing mechanism comprises the stopper 5 and a soft sealing assembly, the stopper 5 is provided with two groups, the two groups of stoppers 5 are arranged at the upper and lower ends inside the stainless steel sleeve 4 and are fixedly connected with the stainless steel sleeve 4, the stopper 5 is arranged at the side of the stainless steel sleeve 4 close to the valve plate 2 and is arranged in close contact with the valve plate 2, the soft sealing assembly is arranged at the connecting position of the valve body 1 and the valve plate 2 and is arranged on the same side of the hard sealing valve seat 3 in correspondence with the stopper 5, the sealing mechanism cooperates with the stopper 5 and the soft sealing assembly to jointly form a composite sealing structure combining soft sealing and hard sealing, wherein the stopper 5 is used as a hard sealing structure inside the stainless steel sleeve 4 to improve the sealing performance between the valve body 1 and the valve plate 2, and the soft sealing assembly is used as a soft sealing structure in the knife gate valve to jointly form the composite sealing structure with the stopper 5, and the sealing mechanism cooperates with the valve body 1 in the closed state as shown in the partial sectional view. Figure 2

[0028] The soft sealing assembly comprises a sealing groove 6 and a sealing rubber ring 7, the sealing groove 6 is arranged inside the valve body 1 close to the hard sealing valve seat 3, the sealing groove 6 is a ring-shaped inverted trapezoidal structure, the sealing rubber ring 7 is arranged inside the sealing groove 6 and is embedded in the valve body 1 through the sealing groove 6, and the soft sealing assembly cooperates with the sealing groove 6 and the sealing rubber ring 7 to perform soft sealing on the valve body 1 and the valve plate 2, wherein the sealing groove 6 is used to provide mounting space for the sealing rubber ring 7 to embed the sealing rubber ring 7 on the valve body 1, the knife gate valve is in a closed state when the valve plate 2 falls into the valve body 1, in the closed state, the sealing rubber ring 7 is in abutment with the valve plate 2, under the action of the valve plate 2, the sealing rubber ring 7 is retracted into the sealing groove 6 and fills the sealing groove 6, and when the knife gate valve is in an open state, the side of the sealing rubber ring 7 away from the valve body 1 protrudes out of the sealing groove 6, and the structure of the knife gate valve in the open state is shown in the schematic view. Figure 3

[0029] The sealing rubber ring 7 is a ring-shaped V-shaped rubber ring structure, the side of the sealing rubber ring 7 close to the valve plate 2 is provided with a round corner structure and part of the sealing rubber ring 7 protrudes out of the sealing groove 6, the part of the sealing rubber ring 7 protruding out of the sealing groove 6 is arranged in close contact with the valve plate 2, the side of the sealing rubber ring 7 close to the valve body 1 is provided with a recess structure, and the side of the sealing rubber ring 7 is shaped with the side wall of the sealing groove 6, wherein the part of the sealing rubber ring 7 protruding out of the sealing groove 6 is provided with a round corner structure to be in abutment with the valve plate 2 to improve the sealing performance between the valve plate 2 and the valve body 1, and the side of the sealing rubber ring 7 close to the valve body 1 is provided with a recess structure to provide a deformation allowance for the sealing rubber ring 7, and the sealing mechanism cooperates with the valve body 1 in the open state as shown in the partial sectional view. Figure 4

[0030] ​​​The adjusting mechanism comprises an adjusting support 8, an adjusting nut 9 and an adjusting valve rod 10, the adjusting support 8 is arranged at the upper end of the valve body 1 and is fixedly connected with the valve body 1 through a bolt at the lower end, the adjusting nut 9 is arranged at the inner side of the upper end of the adjusting support 8 and is rotationally connected with the adjusting support 8, the adjusting valve rod 10 is arranged at the inner side of the adjusting nut 9 and is threadedly connected with the adjusting nut 9, the lower end of the adjusting valve rod 10 is connected with the upper end of the valve plate 2 through a connecting head, the adjusting valve rod 10 is located at the inner side of the adjusting support 8, the adjusting mechanism is formed by cooperation of the adjusting support 8, the adjusting nut 9 and the adjusting valve rod 10, and constitutes the adjusting structure of the knife gate valve to adjust the position of the valve plate 2, wherein the adjusting support 8 is used for providing mounting support for the adjusting nut 9 and the adjusting valve rod 10, the adjusting nut 9 is used for providing mounting support for the adjusting valve rod 10 and driving the adjusting valve rod 10 to rotationally screw through rotation of the adjusting nut 9, so as to realize the lifting action of the adjusting valve rod 10, and then the adjusting valve rod 10 drives the valve plate 2 to lift to adjust the position of the valve plate 2, and the gate valve is opened or closed.

[0031] The valve cover 11 is arranged at the upper end of the valve body 1 and is inserted with the valve body 1, the valve plate 2 penetrates through the valve cover 11, and the packing seal 12 is arranged between the valve cover 11 and the valve body 1 and is arranged in close contact with the valve cover 11 and the valve body 1, wherein the valve cover 11 is used as the packaging structure of the upper end of the valve body 1 to close the upper end of the valve body 1 and guide the valve plate 2, and the packing seal 12 is used to ensure the cooperation precision between the valve cover 11 and the valve body 1 and improve the sealing property therebetween.

[0032] The hand wheel 13 is assembled at the upper part of the adjusting nut 9 and is fixedly connected with the adjusting nut 9, the pressure bearing 14 is arranged between the adjusting support 8 and the hand wheel 13 and is sleeved with the adjusting nut 9, and the hand wheel 13 is connected with the adjusting support 8 through the pressure bearing 14, wherein the hand wheel 13 is used to constitute the adjusting structure together with the adjusting nut 9, the hand wheel 13 can drive the adjusting nut 9 to rotate by rotating the hand wheel 13, so as to drive the adjusting valve rod 10 to rotationally screw and realize the lifting action of the adjusting valve rod 10, and the pressure bearing 14 is used to mount and connect the hand wheel 13 with the adjusting support 8.

[0033] The oil injection nozzle 15 is arranged at the upper part of the adjusting support 8 corresponding to the adjusting nut 9 and penetrates through the adjusting support 8, wherein the oil injection nozzle 15 is used as the oil injection structure on the adjusting support 8, and the lubricating oil can be added to the adjusting nut 9 through the oil injection nozzle 15, so as to improve the rotation smoothness of the adjusting nut 9.

[0034] Working principle:

[0035] The hard sealing valve seat 3 is installed on the inner side of the valve body 1, the stainless steel sleeve 4 is installed on the inner side of the valve body 1, the hard sealing valve seat 3 and the stainless steel sleeve 4 are located on both sides of the valve plate 2 respectively, the valve cover 11 and the packing seal 12 are installed on the upper end of the valve body 1, the valve plate 2 penetrates the valve cover 11 and is inserted into the valve body 1, the adjusting mechanism is installed on the upper end of the valve body 1 and is connected with the valve plate 2, and then the valve body 1 is installed in the pipeline system to work.

[0036] The utility model discloses the beneficial effect is simple structure is provided with valve seat mechanism, and valve seat structure and valve body can detachable connection, can according to actual situation to valve seat structure is dismantled replacement, and is provided with sealing mechanism, and through the cooperation of soft sealing and hard sealing constitutes the composite sealing structure, can effectively improve the sealing between valve body and valve plate, avoids the leakage phenomenon of knife type gate valve, in addition, the valve body diameter and sealing interface are perpendicular arrangement, when medium passes, it is difficult to produce vortex, can promote the durability of valve and service life, is provided with adjusting mechanism, and it is detachable connection through bolt and valve body, can replace the support structure alone, and the economic benefit is high.

[0037] The above embodiment of the utility model has been described in detail, but the content is only the preferred embodiment of the utility model, and cannot be considered as being used for limiting the implementation scope of the utility model. Any equivalent change and improvement within the application scope of the utility model should still belong to the patent coverage scope of the utility model.

Claims

1. A high-sealing wear-resistant knife gate valve, comprising a valve body (1) and a valve plate (2), the valve body (1) is a hollow structure inside, and the valve plate (2) is inserted in the valve body (1) inside, characterized in that, Also include the valve seat mechanism for constituting the detachable valve seat structure, the sealing mechanism for the composite sealing of the valve body (1) and the valve plate (2) and the adjusting mechanism for adjusting the valve plate (2), the valve seat mechanism is assembled in the inside of the valve body (1), the sealing mechanism is arranged between the valve body (1) and the valve plate (2), the adjusting mechanism is configured in the upper end of the valve body (1); The valve seat mechanism includes a hard sealing valve seat (3) and a stainless steel sleeve (4), the hard sealing valve seat (3) is arranged on the inside of the valve body (1) and is arranged with the inner wall of the valve body (1), the stainless steel sleeve (4) is arranged on the inside of the valve body (1) away from the hard sealing valve seat (3) and is arranged with the inner wall of the valve body (1), the hard sealing valve seat (3) and the stainless steel sleeve (4) are respectively located on both sides of the valve plate (2); The sealing mechanism includes a stop block (5) and a soft sealing assembly, the stop block (5) is provided with two groups, two groups of the stop block (5) are respectively arranged on the upper and lower ends of the inside of the stainless steel sleeve (4) and are fixedly connected with the stainless steel sleeve (4), the stop block (5) is arranged on the side of the stainless steel sleeve (4) close to the valve plate (2) and is arranged with the valve plate (2), the soft sealing assembly is arranged at the connection of the valve body (1) and the valve plate (2) and is arranged on the same side of the hard sealing valve seat (3) corresponding to the stop block (5); The soft sealing assembly includes a sealing groove (6) and a sealing rubber ring (7), the sealing groove (6) is arranged on the inside of the side of the valve body (1) close to the hard sealing valve seat (3), the sealing groove (6) is annular inverted trapezoidal structure, the sealing rubber ring (7) is arranged in the inside of the sealing groove (6) and is embedded in the valve body (1) through the sealing groove (6).

2. A high sealing, abrasion resistant knife gate valve as defined in claim 1, wherein, The hard sealing valve seat (3) is made of alloy steel material, the diameter of the stainless steel sleeve (4) is greater than the diameter of the hard sealing valve seat (3).

3. A high sealing, abrasion resistant knife gate valve as defined in claim 2, wherein, The sealing rubber ring (7) is annular V-shaped rubber ring structure, the side of the sealing rubber ring (7) close to the valve plate (2) is provided with a round corner structure and part of the sealing rubber ring (7) protrudes from the sealing groove (6), the part of the sealing rubber ring (7) protruding from the sealing groove (6) is arranged with the valve plate (2), the side of the sealing rubber ring (7) close to the valve body (1) is provided with a recess structure and the side of the sealing rubber ring (7) is shaped with the side wall of the sealing groove (6).

4. A high sealing, abrasion resistant knife gate valve as defined in claim 3 wherein, The adjusting mechanism comprises an adjusting support (8), an adjusting nut (9) and an adjusting valve rod (10), the adjusting support (8) is arranged at the upper end of the valve body (1) and is fixedly connected with the valve body (1) through a bolt at the lower end, the adjusting nut (9) is arranged at the inner side of the upper end of the adjusting support (8) and is rotationally connected with the adjusting support (8), the adjusting valve rod (10) is arranged at the inner side of the adjusting nut (9) and is threadedly connected with the adjusting nut (9), the lower end of the adjusting valve rod (10) is connected with the upper end of the valve plate (2) through a connecting head, and the adjusting valve rod (10) is located at the inner side of the adjusting support (8).

5. A high sealing, abrasion resistant knife gate valve as defined in claim 4 wherein, Further comprising a valve cover (11) and a packing seal (12), the valve cover (11) is arranged at the upper end of the valve body (1) and is inserted with the valve body (1), the valve plate (2) penetrates the valve cover (11), and the packing seal (12) is arranged between the valve cover (11) and the valve body (1) and is arranged in close contact with the valve cover (11) and the valve body (1).

6. A high sealing, abrasion resistant knife gate valve as defined in claim 5 wherein, Further comprising a hand wheel (13) and a pressure bearing (14), the hand wheel (13) is assembled at the upper part of the adjusting nut (9) and is fixedly connected with the adjusting nut (9), the pressure bearing (14) is arranged between the adjusting support (8) and the hand wheel (13) and is sleeved with the adjusting nut (9), and the hand wheel (13) is connected with the adjusting support (8) through the pressure bearing (14).

7. A high sealing, abrasion resistant knife gate valve as defined in claim 6 wherein, Further comprising an oil injection nozzle (15), the oil injection nozzle (15) is arranged at the upper part of the adjusting support (8) corresponding to the adjusting nut (9) and penetrates the adjusting support (8).

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