Full-lining anti-pollution double-sealing flat gate valve

Abstract

The utility model relates to the technical field of valves, in particular to a full-lining anti-pollution double-seal flat gate valve which comprises a valve body, a valve cover, a gate plate, a valve rod and an executing mechanism, a channel is arranged in the valve body, the gate plate is arranged in the valve body and used for communicating or blocking the channel, the valve cover is connected with the valve body, and the valve rod is connected with the valve cover. One end of the valve rod penetrates through the valve deck to be connected with the executing mechanism, the other end of the valve rod is connected with the gate plate, the two sides, corresponding to the gate plate, in the valve body are each provided with a valve seat in a sealing fit mode, a lining is arranged at the position, corresponding to the gate plate, in the valve body, and the lining and the two valve seats are matched to completely cover the inner wall of the channel. The lining is matched with the valve seats on the two sides to separate the valve body from media flowing in the channel, metal is isolated from being in contact with the media, and the lining and the valve seats which are fully covered have the advantages of being resistant to abrasion and corrosion and compact.

Description

TECHNICAL FIELD

[0001] The utility model relates to valve technical field especially is related to a full lining pollution prevention double sealing flat plate gate valve. BACKGROUND

[0002] Gate valve is the most important one kind of valve at present, and it is widely used in the flow and cut-off of liquid, gas, dust and other media.

[0003] And the gate valve can also be used in the field of new energy materials, the production process of lithium battery raw materials, cannot contact metal, otherwise the purity of battery material will be polluted, leading to the performance of battery decline. The existing flat plate gate valve on the market has fluorine lining or rubber lining, but it is not wear-resistant or corrosion-resistant, and the ordinary ceramic flat plate gate valve cannot isolate the contact between metal and medium.

[0004] The technical problem to be solved at present is how to realize the three characteristics of wear resistance, corrosion resistance and density at the same time. In addition, since the flat plate gate valve has a long strip shape, dry powder medium is easy to leak from the packing during opening and closing, causing environmental pollution. UTILITY MODEL CONTENTS

[0005] The utility model discloses a full lining pollution prevention double sealing flat plate gate valve, which overcomes the shortcomings and deficiencies of the prior art, and separates the valve body from the medium flowing in the channel by the cooperation of the bushing and the valve seats on both sides, thereby isolating the contact between metal and medium, and the full-coverage bushing and valve seat have the advantages of wear resistance, corrosion resistance and density.

[0006] The utility model adopts the technical scheme as follows: a full lining pollution prevention double sealing flat plate gate valve, which comprises a valve body, a valve cover, a gate plate, a valve rod and an actuating mechanism, the valve body is internally provided with a channel, the gate plate is arranged in the valve body to communicate or block the channel, the valve cover is connected with the valve body, one end of the valve rod penetrates through the valve cover and is connected with the actuating mechanism, and the other end is connected with the gate plate, the two sides of the gate plate in the valve body are respectively sealed and matched with a valve seat, a bushing is arranged at the position of the gate plate in the valve body, and the bushing and the two valve seats cooperate to cover the inner wall of the channel.

[0007] The gate plate divides the channel into an inlet channel and an outlet channel by being sealed and matched with the two valve seats respectively, the bushing is provided with a flow channel for communicating the inlet channel and the outlet channel, and the bushing is also provided with a gap for the gate plate to extend into.

[0008] The valve body comprises a first valve body and a second valve body symmetrically arranged on both sides of the gate plate, the first valve body is internally provided with an inlet channel, the second valve body is internally provided with an outlet channel, the first valve body is fixedly connected with the second valve body through a bolt, the two valve seats are respectively a first valve seat arranged in the first valve body and a second valve seat arranged in the second valve body, and the bushing comprises a first bushing and a second bushing symmetrically arranged on both sides of the gate plate, the first bushing and the second bushing are buckled to form a gap for the gate plate to extend into.

[0009] The second valve seat is provided with a flow guide groove on the side away from the valve cover.

[0010] The two valve seats are both extended into the flow passage, and the gate plate is in sealing cooperation with the two valve seats when the gate plate blocks the flow passage.

[0011] The first packing is arranged between the gate plate and the valve body, the first gland is connected with the valve body, one end of the first packing is abutted with the bushing and the other end is abutted with the first gland, the second packing is arranged between the valve stem and the valve cover, the second gland is connected with the valve cover, one end of the second packing is abutted with the valve cover and the other end is abutted with the second gland.

[0012] The first gland is arranged in the sealing cavity.

[0013] The bushing and the valve seat are both made of ceramic material, and the gate plate is made of zirconia ceramic material.

[0014] The utility model discloses the bushing and the valve seat cooperate with two sides and separate the valve body and the medium circulation in the channel, that is, the channel of both sides of the gate plate is respectively installed with a valve seat sealing cooperation, and the channel of both sides is covered, and the position of the gate plate is also installed with a bushing, and the position of the gate plate opening and closing is covered, realizes the internal full coverage of valve body, insulates metal and medium contact, and the bushing and valve seat of full coverage have the advantages of wear resistance, corrosion resistance and compactness, guaranteeing medium purity. BRIEF DESCRIPTION OF DRAWINGS

[0015] In order to more clearly illustrate the technical scheme in the embodiments of the utility model or the prior art, the following will briefly introduce the drawings needed to be used in the embodiment or the prior art description, and obviously, the drawings in the following description are only some embodiments of the utility model, and for those skilled in the art, under the premise of not paying the creative labor, according to these drawings, other drawings still belong to the scope of the utility model.

[0016] Figure 1 It is the structure diagram of the full-lining anti-pollution double-sealing flat gate valve of the utility model;

[0017] Figure 2 is a partial view of the present application;

[0018] Figure 3 is a structural schematic view of the present application from another perspective;

[0019] Figure 4 is a structural schematic view of the cooperation between the valve seat and the bushing in the present application;

[0020] Figure 5 is a sectional view and a left view of the second bushing in the present application;

[0021] Figure 6 is a structural schematic view of the first valve seat and the second valve seat in the present application;

[0022] In the figure, 1-valve body, 2-valve cover, 3-shutter, 4-valve rod, 5-actuator, 6-channel, 7-valve seat, 8-bushing, 9-inlet channel, 10-outlet channel, 11-flow passage, 12-clearance, 13-first valve body, 14-second valve body, 15-bolt, 16-first valve seat, 17-second valve seat, 18-first bushing, 19-second bushing, 20-flow guide groove, 21-first gland, 22-second gland, 23-first packing, 24-second packing, 25-sealing cavity. DETAILED DESCRIPTION

[0023] To make the purpose, technical scheme and advantages of the present application clearer, the present application will be further described in detail below with reference to the drawings.

[0024] It should be noted that all the expressions of "first" and "second" in the embodiments of the present application are used to distinguish two same-named but different entities or different parameters, and it can be seen that "first" and "second" are only used for the convenience of description, and should not be understood as a limitation on the embodiments of the present application, and subsequent embodiments will not be described one by one.

[0025] The directions and positions mentioned in the present application, such as "up", "down", "front", "back", "left", "right", "inside", "outside", "top", "bottom", "side", etc., are only the directions or positions of the drawings. Therefore, the directions and positions used are used to explain and understand the present application, and are not a limitation on the protection scope of the present application.

[0026] As Figures 1 to 6As shown, it is one embodiment of the utility model, full lining pollution prevention double sealing flat gate valve, including valve body 1, valve cover 2, gate 3, valve stem 4 and actuator 5, the inside of valve body 1 is equipped with passageway 6, the gate 3 is arranged in valve body 1 is used to connect or block passageway 6, valve cover 2 is connected with valve body 1, valve stem 4 one end penetrates valve cover 2 and is connected with actuator 5 and the other end is connected with gate 3, the inside of valve body 1 corresponds the both sides of gate 3 respectively sealed fit with a valve seat 7, the inside of valve body 1 corresponds the position of gate 3 is equipped with bushing 8, bushing 8 and two valve seats 7 cooperate and cover the inner wall of passageway 6 entirely.

[0027] The beneficial effects of such arrangement are as follows: the utility model separates the valve body and the medium flowing in the passageway by the cooperation of the bushing and the valve seats on both sides, that is, one valve seat is installed on both sides of the passageway of the gate for sealing cooperation, both sides of the passageway are covered, and a bushing is also installed at the position of the gate, so that the opening and closing positions of the gate are covered, realizing the full coverage of the inside of the valve body, isolating the contact between the metal and the medium, and the bushing and the valve seat with full coverage have the advantages of wear resistance, corrosion resistance and tightness, ensuring the purity of the medium.

[0028] Further arrangement, the gate 3 is divided into inlet passageway 9 and outlet passageway 10 by sealing cooperation with two valve seats 7, the bushing 8 is provided with overflow channel 11 connecting the inlet passageway 9 and the outlet passageway 10, and the bushing 8 is also provided with gap 12 for the gate 3 to extend into.

[0029] The beneficial effects of such arrangement are as follows: the bushing clamps the gate, the gate moves back and forth in the bushing along the gap to connect or block the overflow channel, realizing the connection and blocking of the inlet passageway and the outlet passageway, preventing the medium from entering the gap between the gate and the valve body, and completely realizing the contact between the medium and the metal material.

[0030] Further arrangement, the valve body 1 includes first valve body 13 and second valve body 14 symmetrically arranged on both sides of the gate 3, the inside of the first valve body 13 is the inlet passageway 9, the inside of the second valve body 14 is the outlet passageway 10, the first valve body 13 is fixedly connected with the second valve body 14 through bolt 15, the two valve seats 7 are respectively first valve seat 16 arranged in the first valve body 13 and second valve seat 17 arranged in the second valve body 14, the bushing 8 includes first bushing 18 and second bushing 19 symmetrically arranged on both sides of the gate 3, the first bushing 18 and the second bushing 19 are buckled to form gap 12 for the gate 3 to extend into.

[0031] The beneficial effects of such an arrangement are as follows: the valve body adopts a two-piece combined structure, and the corresponding valve seat and bushing also adopt a two-piece combined structure, clamping the gate plate, solving the problem of difficult machining. In the embodiment, the bolt is a bolt of the prior art, the bushing can be integrated after being glued, and the split structure facilitates the replacement and maintenance of single parts, saving costs and improving maintenance efficiency.

[0032] Further arrangement, the second valve seat 17 is provided with a flow guide groove 20 away from one side of the valve cover 2.

[0033] The beneficial effects of such an arrangement are as follows: by providing a flow guide groove at the bottom of the second valve seat of the outlet channel, the medium is prevented from being blocked at the bottom of the channel.

[0034] Further arrangement, both the valve seats 7 extend into the flow passage 11, and the gate plate 3 is in sealing cooperation with both the valve seats 7 when the gate plate 3 blocks the flow passage 11.

[0035] The beneficial effects of such an arrangement are as follows: the ends of the two valve seats extend into the flow passage inside the bushing for sealing cooperation with the gate plate, and the combination of the valve seat and the bushing forms a closed sealing structure, isolating the medium from the valve body and having better sealing performance.

[0036] Further arrangement, it further comprises a first gland 21, a second gland 22, a first packing 23 and a second packing 24, the first packing 23 is arranged between the gate plate 3 and the valve body 1, the first gland 21 is connected with the valve body 1, one end of the first packing 23 abuts against the bushing 8 and the other end abuts against the first gland 21, the second packing 24 is arranged between the valve stem 4 and the valve cover 2, the second gland 22 is connected with the valve cover 2, one end of the second packing 24 abuts against the valve cover 2 and the other end abuts against the second gland 22.

[0037] The beneficial effects of such an arrangement are as follows: the first gland and the first packing are arranged in combination between the valve body and the valve cover, and the second gland and the second packing are arranged in combination between the valve stem and the valve cover. In the embodiment, the first packing is a rectangular packing and the second packing is a circular packing, forming a double packing sealing structure, which greatly increases the ability to prevent medium leakage.

[0038] Further arrangement, a sealing cavity 25 is arranged between the valve cover 2 and the valve body 1, and the first gland 21 is arranged in the sealing cavity 25.

[0039] The beneficial effects of such an arrangement are as follows: the sealing cavity further prevents environmental pollution caused by medium leakage.

[0040] Further arrangement, the bushing 8 and the valve seat 7 are made of ceramic material, and the gate plate 3 is made of zirconia ceramic material.

[0041] The beneficial effects of the arrangement are as follows: the ceramic material has stronger wear resistance and corrosion resistance, can isolate the medium from contacting the metal valve body, ensures the purity of the medium, and the bushing and the valve seat adopt a split structure, solves the problem that the ceramic material is difficult to process complex structures, the whole gate plate adopts zirconia ceramic material, and the purpose that the medium does not contact the metal material is completely achieved.

[0042] The above only discloses the preferred embodiment of the utility model, and of course cannot limit the scope of the utility model, therefore, equivalent changes made according to the utility model claim still belong to the range covered by the utility model.

Claims

1. A fully lined, anti-pollution, double-sealed flat gate valve, comprising a valve body (1), a valve cover (2), a gate (3), a valve stem (4), and an actuator (5), wherein the valve body (1) has an internal channel (6), the gate (3) is disposed within the valve body (1) to connect or block the channel (6), the valve cover (2) is connected to the valve body (1), one end of the valve stem (4) passes through the valve cover (2) and is connected to the actuator (5), and the other end is connected to the gate (3), characterized in that: The valve body (1) has a valve seat (7) sealed and fitted on both sides of the gate (3) inside. The valve body (1) has a bushing (8) at the position corresponding to the gate (3) inside. The bushing (8) and the two valve seats (7) cooperate to completely cover the inner wall of the channel (6).

2. The fully lined, anti-pollution, double-sealed flat gate valve according to claim 1, characterized in that: The gate (3) divides the channel (6) into an inlet channel (9) and an outlet channel (10) by sealing with the two valve seats (7). The bushing (8) has a flow passage (11) connecting the inlet channel (9) and the outlet channel (10). The bushing (8) also has a gap (12) for the gate (3) to extend into.

3. The fully lined, anti-pollution, double-sealed flat gate valve according to claim 2, characterized in that: The valve body (1) includes a first valve body (13) and a second valve body (14) symmetrically arranged on both sides of the gate (3). The first valve body (13) has an inlet channel (9) inside, and the second valve body (14) has an outlet channel (10) inside. The first valve body (13) is fixedly connected to the second valve body (14) by bolts (15). The two valve seats (7) are respectively a first valve seat (16) arranged inside the first valve body (13) and a second valve seat (17) arranged inside the second valve body (14). The bushing (8) includes a first bushing (18) and a second bushing (19) symmetrically arranged on both sides of the gate (3). The first bushing (18) and the second bushing (19) are fastened together to form a gap (12) for the gate (3) to extend into.

4. The fully lined, anti-pollution, double-sealed flat gate valve according to claim 3, characterized in that: The second valve seat (17) is provided with a guide groove (20) on the side away from the valve cover (2).

5. The fully lined, anti-pollution, double-sealed flat gate valve according to claim 2, characterized in that: Both valve seats (7) extend into the flow passage (11), and when the gate (3) blocks the flow passage (11), the gate (3) and the two valve seats (7) are sealed together.

6. The fully lined, anti-pollution, double-sealed flat gate valve according to claim 1, characterized in that: It also includes a first gland (21), a second gland (22), a first packing (23), and a second packing (24). The first packing (23) is disposed between the gate (3) and the valve body (1). The first gland (21) is connected to the valve body (1). One end of the first packing (23) abuts against the bushing (8) and the other end abuts against the first gland (21). The second packing (24) is disposed between the valve stem (4) and the valve cover (2). The second gland (22) is connected to the valve cover (2). One end of the second packing (24) abuts against the valve cover (2) and the other end abuts against the second gland (22).

7. The fully lined, anti-pollution, double-sealed flat gate valve according to claim 6, characterized in that: A sealing cavity (25) is provided between the valve cover (2) and the valve body (1), and the first pressure cap (21) is disposed in the sealing cavity (25).

8. The fully lined, anti-pollution, double-sealed flat gate valve according to claim 1, characterized in that: Both the bushing (8) and the valve seat (7) are made of ceramic material, and the gate (3) is made of zirconium oxide ceramic material.

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