Valve plate sealing structure and forged steel gate valve

Abstract

The utility model discloses a valve plate sealing structure and a forged steel gate valve, and relates to the technical field of gate valves. The sealing plates are symmetrically inserted and mounted on the two sides of the valve plate; the sealing rings abut against the outer sides of the corresponding sealing plates; the forged steel gate valve comprises a valve plate sealing structure, a valve body, a valve cover installed on the valve body, a valve rod in threaded connection with the valve cover and a hand wheel installed at the top of the valve rod, and the valve plate is movably connected with the valve rod. By arranging the valve plate sealing structure, not only is the overall sealing effect of the gate valve improved, but also worn parts can be independently replaced when the gate valve is worn, and the cost is saved.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of gate valves, in particular to a valve plate sealing structure and a forged steel gate valve. BACKGROUND

[0002] The gate valve is a commonly used valve, wherein the valve plate is moved in the direction perpendicular to the fluid motion direction to achieve the purpose of opening and closing the valve body. In the prior art, in order to increase the sealing effect, an elastic sealing structure is arranged at the connection between the valve plate and the valve body, and the sealing structure is used in combination with the valve plate. Therefore, when the valve plate needs to be replaced due to frequent use and large wear, the sealing structure and the valve plate need to be replaced together, which not only increases the cost, but also prolongs the replacement time, thereby reducing the work efficiency. CONTENT OF THE UTILITY MODEL

[0003] Therefore, the application provides a valve plate sealing structure and a forged steel gate valve to solve the technical problem that when the valve plate needs to be replaced due to frequent use and large wear, the sealing structure and the valve plate need to be replaced together, which not only increases the cost, but also prolongs the replacement time, thereby reducing the work efficiency.

[0004] To achieve the above-mentioned purpose, the utility model provides the following technical scheme:

[0005] A valve plate sealing structure comprises:

[0006] a valve plate;

[0007] a pair of sealing plates symmetrically inserted and installed on both sides of the valve plate;

[0008] a pair of sealing rings each abutting against the outer side of the corresponding sealing plate.

[0009] Further, the sealing plate comprises a side plate, a first protruding plate and a second protruding plate, the first protruding plate and the second protruding plate are arranged on the side plate in an upper-lower interval, and protrude to one side of the side plate.

[0010] Further, the upper end of the valve plate is provided with a first insertion slot on both sides, and the first protruding plate is installed in the corresponding first insertion slot, so that the valve plate and the sealing plate are installed together.

[0011] Further, the lower end of the valve plate is provided with a second insertion slot on both sides, and the second protruding plate is installed in the corresponding second insertion slot, so that the valve plate and the sealing plate are installed together.

[0012] Further, the lower end of the side plate further has a bottom plate protruding to one side, and the bottom plate is supported on the bottom of the valve plate.

[0013] Further, the sealing ring comprises a lug and a sealing part connected integrally, the lug is connected to one side of the lower end of the sealing part, a plurality of convex lips are arranged on the side of the sealing part away from the lug, and the convex lips can abut on the outer side of the corresponding sealing plate.

[0014] The application further provides a forged steel gate valve comprising the valve plate sealing structure, and further comprising:

[0015] a valve body;

[0016] a valve cover mounted on the valve body;

[0017] a valve stem threadedly connected with the valve cover;

[0018] a hand wheel mounted on the top of the valve stem;

[0019] a connecting seat threadedly connected with the valve stem, and the valve plate is fixedly connected with the connecting seat.

[0020] Further, the valve plate can move up and down in the valve body.

[0021] Further, the valve body is provided with a mounting piece, and the lug is mounted on the mounting piece.

[0022] Further, the valve body is provided with a receiving groove, and the lower ends of the pair of sealing parts are received in the receiving groove.

[0023] From the above technical solution, the application has the following advantages:

[0024] 1. In the application, the valve plate sealing structure comprises a valve plate, sealing plates and a sealing ring, two sealing plates are mounted on the two sides of the valve plate to preliminarily seal and protect the valve plate, the sealing ring is arranged between the valve body and the sealing plates to reseal and protect the valve plate, the sealing ring can be replaced when it is slightly worn after long use, and the two sealing plates can be removed from the valve plate and replaced when they are seriously worn, so that the worn parts can be individually replaced according to the wear condition, the parts do not need to be completely replaced each time, the waste of parts is avoided, the cost is saved, and the work efficiency is improved.

[0025] 2. In the application, the sealing ring is mounted on the mounting piece through the lug, and the mounting piece is mounted on the valve body, so that the sealing ring and the mounting piece can be easily removed from the valve body, and the installation and replacement of the parts are more convenient. BRIEF DESCRIPTION OF DRAWINGS

[0026] The accompanying drawings, which form part of this application, are used to provide a further understanding of this application. The illustrative embodiments of this application and their descriptions are used to explain this application and do not constitute an undue limitation of this application.

[0027] Figure 1 This is a schematic diagram of the valve plate sealing structure of this application.

[0028] Figure 2 for Figure 1 A schematic diagram of the sealing plate in the diagram.

[0029] Figure 3 for Figure 1 A magnified view of part A.

[0030] Figure 4 for Figure 1 A magnified view of section B.

[0031] Figure 5 This is a schematic diagram of the sealing plate of this application.

[0032] Figure 6 This is a schematic diagram of the sealing ring structure of this application.

[0033] Figure 7 This is a schematic diagram of the forged steel gate valve of this application.

[0034] Figure 8 for Figure 7 A partial sectional view.

[0035] Figure 9 for Figure 8 A magnified view of a portion of point C.

[0036] Figure 10 for Figure 8 A magnified view of a portion of point D.

[0037] Explanation of reference numerals in the attached drawings: 1-Valve body; 2-Valve cover; 3-Handwheel; 4-Valve stem; 5-Connecting seat; 6-Valve plate; 61-First slot; 62-Second screw hole; 63-Second slot; 64-Third screw hole; 7-Sealing plate; 71-First convex plate; 711-First through hole; 72-Side plate; 73-Second convex plate; 731-Second through hole; 74-Base plate; 741-Groove; 8-First screw; 9-Second screw; 10-Sealing ring; 101-Protruding lip; 102-Protrusion; 103-Mounting part; 1031-Third through hole; 1032-Positioning groove; 104-Sealing part; 1041-Fourth through hole; 11-Receiving groove; 12-Third screw; 13-Restricting groove; 14-First screw hole; 15-Fourth screw. Detailed Implementation

[0038] For the purpose, technical solutions and advantages of the present application to be clearer, more comprehensible, the present application is further described in detail below in conjunction with the embodiments and drawings. Herein, the illustrative embodiments of the present application and the descriptions thereof are used to explain the present application, but not as a limitation of the present application.

[0039] Reference Figures 1 to 6 As Figure 1 shown, the present embodiment provides a valve plate sealing structure, comprising: a valve plate 6, a pair of sealing plates 7 and a pair of sealing rings 10, the pair of sealing plates 7 are symmetrically inserted and installed on the left and right sides of the valve plate 6; the pair of sealing rings 10 are symmetrically abutted on the outer sides of the pair of sealing plates 7; the sealing ring 10 can seal the upper and lower ends of the pair of sealing plates 7, i.e. seal the upper and lower ends of the valve plate 6, so as to ensure that the valve plate 6 has good flow cutting function.

[0040] In an embodiment, as Figure 2 and Figure 5 shown, the sealing plate 7 comprises a side plate 72, and a first protruding plate 71, a second protruding plate 73 and a bottom plate 74 protruding to one side of the side plate 72, the first protruding plate 71, the second protruding plate 73 and the second protruding plate 73 are all connected to the same side of the side plate 72, and the bottom plate 74 is supported on the bottom of the valve plate 6, which can support and protect the bottom of the valve plate 6, thereby reducing the wear of the valve plate 6 and prolonging the service life.

[0041] As Figure 2 , Figure 3 and Figure 4 shown, the upper end of the valve plate 6 is provided with a first insertion slot 61 on both sides, and the first protruding plate 71 is installed in the corresponding first insertion slot 61, so that the upper end of the valve plate 6 is installed together with the sealing plate 7.

[0042] Specifically, the first protruding plate 71 is provided with a first through hole 711, the lower end of the first insertion slot 61 is provided with a second screw hole 62 capable of communicating with the first through hole 711, and the lower end of the first screw 8 is threadedly connected in the second screw hole 62 of the valve plate 6 after passing through the first through hole 711, and then the first protruding plate 71 is inserted in the first insertion slot 61, so that the upper end of the sealing plate 7 is firmly installed together with the upper end of the valve plate 6.

[0043] As Figure 4 shown, the lower end of the valve plate 6 is provided with a second insertion slot 63 on both sides, and the second protruding plate 73 is installed in the corresponding second insertion slot 63, so that the lower end of the valve plate 6 is installed together with the sealing plate 7.

[0044] Specifically, the second convex plate 73 is provided with a second through hole 731, the upper end of the second slot 63 is provided with a third threaded hole 64 communicated with the second through hole 731, and the upper end of the second screw 9 is screwed into the third threaded hole 64 of the valve plate 6 after passing through the second through hole 731. In combination with the second convex plate 73 and the second slot 63, the lower end of the sealing plate 7 and the lower end of the valve plate 6 can be firmly installed together.

[0045] Preferably, the bottom plate 74 is provided with a groove 741 communicated with the third threaded hole 64, and the head (i.e. the lower end) of the second screw 9 is accommodated in the groove 741. By hiding the head of the second screw 9, the installation space when connecting the valve plate 6 and the sealing plate 7 can be reduced.

[0046] As shown in Figure 6 , the sealing ring 10 comprises a convex block 102 and a sealing portion 104 connected integrally, the convex block 102 is connected with the valve body 1, the convex block 102 is connected to one side of the upper end of the sealing portion 104, and a plurality of annular convex lips 101 are integrally machined on the side of the sealing portion 104 away from the convex block 102. The convex lips 101 can be abutted on the outer side surface of the upper end of the sealing plate 7, so as to realize the sealing effect of the upper end of the sealing plate 7.

[0047] Preferably, the convex block 102 is fixed with the valve body 1 by the fourth screw 15.

[0048] Preferably, the sealing portion 104 is provided with a fourth through hole 1041 for liquid to pass through.

[0049] As shown in Figures 7 to 10 , the sealing ring 10 comprises a convex block 102 and a sealing portion 104 connected integrally, the convex block 102 is connected with the valve body 1, the convex block 102 is connected to one side of the upper end of the sealing portion 104, and a plurality of annular convex lips 101 are integrally machined on the side of the sealing portion 104 away from the convex block 102. The convex lips 101 can be abutted on the outer side surface of the upper end of the sealing plate 7, so as to realize the sealing effect of the upper end of the sealing plate 7. Figure 7 and Figure 8 As shown in the drawings, the embodiment further provides a forged steel gate valve, comprising a valve plate sealing structure, further comprising: a valve body 1, a valve cover 2, a valve stem 4 and a hand wheel 3, the valve cover 2 is installed on the upper end of the valve body 1; the valve stem 4 is threadedly connected with the valve cover 2, so that the lower end of the valve stem 4 can rotate in the valve body 1; the hand wheel 3 is installed on the top of the valve stem 4, and the hand wheel 3 is located above the valve cover 2 for hand holding when rotating the valve stem 4; the valve plate 6 is rotatably connected with the lower end of the valve stem 4 through the connecting seat 5, the valve body 1 is provided with a containing groove 11, and the lower ends of a pair of sealing rings 10 are accommodated in the containing groove 11.

[0050] Specifically, the bottom of the containing groove 11 is provided with two limiting grooves 13, and the lower end of the sealing portion 104 can be abutted in the corresponding limiting groove 13, so as to realize the firm sealing of the sealing ring 10 and the lower end of the valve body 1.

[0051] In the embodiment, the valve body 1 is made of forged steel material, which has high hardness, toughness and wear resistance, as well as good plasticity, forgeability and corrosion resistance, so that the gate valve of the application can have a longer service life.

[0052] The valve plate 6 is installed at the lower end of the connecting seat 5, when the hand wheel 3 is rotated, the valve rod 4 is synchronously rotated, under the cooperation of the valve rod 4 and the connecting seat 5, the valve plate 6 drives a pair of sealing plates 7 to synchronously move, so that the valve plate 6 can move up and down on the valve body 1, the valve plate 6 moves up to open the valve body 1, realizing the flow of liquid, when the valve plate 6 moves down and abuts in the limiting groove 13, it will make the valve body 1 close, realizing the flow cut-off. In the embodiment of the application, as shown in Figure 10 The sealing ring 10 is installed on the valve body 1, and the sealing ring 10 abuts on the side surface of the sealing plate 7 through the convex lip 101, and the bottom of the sealing ring 10 abuts in the limiting groove 13. Therefore, by arranging the sealing ring 10, the upper and lower ends of the pair of sealing plates 7 can be fully sealed, so as to ensure that the leakage prevention effect is better when the valve plate 6 cuts off the flow.

[0053] As shown in Figure 9 The valve body 1 is provided with a mounting piece 103 through the third screw 12, and the convex block 102 is installed on the mounting piece 103 through the fourth screw 15, so that the sealing ring 10 is connected with the valve body 1 as a whole.

[0054] Specifically, the third through hole 1031 is arranged on the mounting piece 103, the first screw hole 14 is arranged on the valve body 1, the lower end of the third screw 12 is screwed into the first screw hole 14 through the third through hole 1031, so as to realize the installation of the mounting piece 103 and the valve body 1; the positioning groove 1032 is arranged on the mounting piece 103, the convex block 102 is correspondingly inserted into the positioning groove 1032, so as to realize the accurate butt joint between the sealing ring 10 and the mounting piece 103, and then the fourth screw 15 is connected between the convex block 102 and the mounting piece 103, so as to realize the firm installation of the convex block 102 and the mounting piece 103. Through the installation mode of the convex block 102 and the mounting piece 103 fixed with the valve body 1, the sealing ring 10 and the mounting piece 103 can be detached from the valve body 1, so as to facilitate the replacement of parts.

[0055] In the embodiment of the application, when the gate valve is opened and closed as a whole, the valve plate 6 moves up to the highest position and does not exceed the top of the sealing ring 10, so when the valve plate 6 drives the pair of sealing plates 7 to move up and down, the sealing ring 10 always abuts on the pair of sealing plates 7, so as to ensure that the valve body 1 and the pair of sealing plates 10 are strictly sealed.

[0056] Working principle: when installing, first install a pair of sealing plates 7 symmetrically on the left and right sides of the valve plate 6, install the mounting piece 103 on the valve body 1, and then install the sealing ring 10 on the mounting piece 103. When the valve plate 6 drives the pair of sealing plates 7 to move downward, the side surface of the pair of sealing plates 7 abuts against the convex lip 101, and the lower end of the pair of sealing plates 7 abuts against the accommodating groove 11 and the lower end of the pair of sealing rings 10 abuts against the corresponding limiting groove 13, thereby realizing complete sealing of the valve plate sealing structure and the inside of the valve body 1. When the sealing ring 10 wears out, the sealing ring 10 can be directly replaced. Further, when the sealing plate 7 and the sealing ring 10 both wear out, the sealing plate 7 and the sealing ring 10 can be replaced. In this way, the worn parts can be replaced individually from the edge to the middle, thereby avoiding the need to replace all parts when the outer parts wear out. This not only reduces the disassembly steps, but also reduces the waste of the valve plate 6 located in the middle, saving costs.

[0057] The above only describes the preferred embodiments of the present application and is not intended to limit the present application. Those skilled in the art can make various changes and modifications to the embodiments of the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A valve plate seal structure, characterized by, It includes: Valve plate (6); A pair of sealing plates (7) symmetrically inserted on both sides of the valve plate (6); A pair of sealing rings (10) each abutting against the outer side of the corresponding sealing plate (7); The sealing plate (7) includes a side plate (72), a first convex plate (71) and a second convex plate (73), the first convex plate (71) and the second convex plate (73) are arranged on the side plate (72) in an up-down interval, and protrude to one side of the side plate (72).

2. The valve plate seal structure of claim 1, wherein, The upper end of the valve plate (6) is provided with a first insertion slot (61) on both sides, and the first convex plate (71) is installed in the corresponding first insertion slot (61), so that the valve plate (6) and the sealing plate (7) are installed together.

3. The valve plate seal structure of claim 1, wherein, The lower end of the valve plate (6) is provided with a second insertion slot (63) on both sides, and the second convex plate (73) is installed in the corresponding second insertion slot (63), so that the valve plate (6) and the sealing plate (7) are installed together.

4. The valve plate seal structure of claim 2, wherein, The lower end of the side plate (72) further has a bottom plate (74) protruding to one side, which is supported on the bottom of the valve plate (6).

5. The valve plate seal structure of claim 1, wherein, The sealing ring (10) includes a protrusion (102) and a sealing part (104) connected integrally, the protrusion (102) is connected to one side of the upper end of the sealing part (104), and a plurality of convex lips (101) are arranged on the side of the sealing part (104) away from the protrusion (102), the convex lips (101) can abut against the outer side of the corresponding sealing plate (7).

6. A forged steel gate valve comprising a valve plate seal structure as claimed in any one of claims 1 to 5, characterized in that, It also includes: Valve body (1); Valve cover (2) installed on the valve body (1); Valve stem (4) threaded with the valve cover (2), the valve plate (6) is movably connected with the valve stem (4); Hand wheel (3) installed on the top of the valve stem (4).

7. The forged steel gate valve according to claim 6, wherein, The valve plate (6) can move up and down in the valve body (1).

8. The forged steel gate valve as claimed in claim 6, wherein, The valve body (1) is provided with a mounting piece (103), and the protrusion (102) is installed on the mounting piece (103).

9. The forged steel gate valve as claimed in claim 6, wherein, The valve body (1) is provided with a containing groove (11), and the lower end of a pair of sealing parts (104) is contained in the containing groove (11).

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