CN111706701A - A ceramic seal vertical check valve - Google Patents

Abstract

The invention discloses a ceramic-sealed vertical check valve, which relates to the technical field of check valves. , the lower surface of the valve body is fixedly connected with a lower valve cover, the middle of the lower valve cover is provided with a water inlet, the inner wall of the lower end of the valve body is fixedly connected with a valve seat, and the valve seat is convex and convex The outlet portion is upward, and the upper surface of the valve seat is inlaid with a valve seat ceramic sealing ring. In the invention, the valve disc ceramic sealing ring is embedded on the lower surface of the valve disc and the boss is fixedly connected on the lower surface of the valve disc. Matching with the groove improves the wear resistance and sealing performance of the valve disc and valve seat. Due to the high strength and corrosion resistance of ceramics, the service life of the check valve is improved.

Description

A ceramic seal vertical check valve

technical field

The invention relates to the technical field of check valves, in particular to a ceramic-sealed vertical check valve.

Background technique

The working principle of the vertical check valve: under the pressure of the medium at the inlet end of the pipeline, the spring resistance is overcome to make the valve open or close. When the medium pressure at the inlet end is lower than that at the outlet end, the spring pushes the valve core to the valve seat to close the valve, preventing the medium from flowing back and playing a check. Vertical check valves are widely used in electric power, petrochemical, metallurgy and other industries. At present, the vertical check valve on the market is under some wear and corrosion conditions. After a long time of wear and corrosion, the sealing surface of the valve disc and the valve seat is worn and corroded, the sealing performance is reduced, and leakage is easy to occur. The situation is serious. It will wear through the valve body and seriously affect the normal operation of the system.

SUMMARY OF THE INVENTION

(1) Technical problems solved

In view of the deficiencies of the prior art, the present invention provides a ceramic-sealed vertical check valve, which solves the problem of wear resistance of the valve disc and the sealing surface of the valve seat of the existing ceramic-sealed vertical check valve proposed in the above background technology. performance and corrosion resistance issues.

(2) Technical solutions

To achieve the above purpose, the present invention is achieved through the following technical solutions:

A ceramic-sealed vertical check valve comprises a valve body, an upper valve cover is fixedly connected to the upper surface of the valve body, a water outlet is opened in the middle of the upper valve cover, and a lower surface of the valve body is fixedly connected with a water outlet. The lower valve cover, the middle part of the lower valve cover is provided with a water inlet, the inner wall of the lower end of the valve body is fixedly connected with a valve seat, the valve seat is convex and the protruding part is upward, and the upper surface of the valve seat is A valve seat ceramic sealing ring is inlaid, a groove is formed on the upper surface of the valve seat ceramic sealing ring, a fixing plate is arranged above the valve seat, and a plurality of fixing columns are fixedly connected to the outer surface of the fixing plate, so The end of the fixing column away from the fixing plate is fixedly connected with the inner wall of the upper end of the valve body, the middle of the fixing plate is provided with a valve stem hole, the inner wall of the valve stem hole is fixedly connected with a guide sleeve, and the inner wall of the guide sleeve is slidably connected There is a valve stem, the upper surface of the valve stem is fixedly connected with a limiting block, the lower surface of the valve stem is fixedly connected with a valve flap, the lower surface of the valve flap is inlaid with a valve flap ceramic sealing ring, and the valve flap ceramic The lower surface of the sealing ring is fixedly connected with a boss, the boss is matched with the groove, the outer surface of the valve stem is sleeved with a spring, and the upper surface of the spring is fixedly connected with the lower surface of the fixed plate, so The lower surface of the spring is fixedly connected with the upper surface of the valve disc.

Further, the upper valve cover has a convex shape, a plurality of first threaded holes are opened on the upper valve cover, and the plurality of first threaded holes are distributed in an annular array with respect to the water outlet.

Further, a plurality of second threaded holes are formed on the lower surface of the lower valve cover, and the plurality of second threaded holes are distributed in an annular array with respect to the water inlet.

Further, the valve seat is located above the lower valve cover, the valve seat is in the shape of a boss, and a through hole is opened in the inside of the valve seat, and the through hole is communicated with the water inlet.

Further, a plurality of the fixing columns are distributed in an annular array, and the fixing columns are in contact with the arc inner wall of the valve body, and a rubber layer is provided at the position where the limiting block contacts the fixing plate.

Further, the valve flap is in the shape of a circular boss, the cross section of the valve flap is in the shape of an inverted trapezoid, and the valve flap ceramic sealing ring is tightly fitted with the valve seat ceramic sealing ring.

Further, both the groove and the boss are in the shape of a ring, the boss is made of ceramic, the spring is a return spring, and the spring is a stainless steel wire spring, and the size of the limit block is larger than the size of the valve stem hole.

(3) Beneficial effects

The invention provides a ceramic sealing vertical check valve, which has the following beneficial effects:

(1), the ceramic seal vertical check valve, by inserting the valve disc ceramic sealing ring on the lower surface of the valve disc and fixing the connection boss on the lower surface, by inserting the valve seat ceramic sealing ring on the upper surface of the valve seat and A groove is provided on its upper surface, so that the boss is matched with the groove, which improves the wear resistance and sealing performance of the valve disc and valve seat. Due to the high strength and corrosion resistance of ceramics, the performance of the check valve is improved. service life.

(2), the ceramic seal vertical check valve, by setting the limit block on the upper surface of the valve stem, when the pressure of the water outlet is greater than the pressure of the water inlet, the valve disc moves to the valve seat under the water pressure difference, when the limit When the position block collides with the fixed plate, the sealing surface of the valve disc is just in close contact with the sealing surface of the valve seat, and the rubber layer is fixed and connected at the position where the limit block and the fixed plate are in contact, which effectively reduces the impact of the limit block and the fixed plate.

Description of drawings

Fig. 1 is the three-dimensional structure schematic diagram of the ceramic sealing vertical check valve of the present invention;

Fig. 2 is the front view structure schematic diagram of the ceramic sealing vertical check valve of the present invention;

FIG. 3 is a schematic view of the cross-sectional structure of A-A in FIG. 2 of the ceramic seal vertical check valve of the present invention;

Fig. 4 is the enlarged structural schematic diagram of part B in Fig. 3 of the ceramic seal vertical check valve of the present invention;

FIG. 5 is a schematic structural diagram of the fixed plate of the ceramic-sealed vertical check valve of the present invention.

In the figure: 1. valve body; 2. water outlet; 3. upper bonnet; 4. first threaded hole; 5. lower bonnet; 6. second threaded hole; 7. water inlet; 8. valve seat; 9 , valve seat ceramic sealing ring; 10, fixed disc; 11, fixed column; 12, valve stem; 13, limit block; 14, guide sleeve; 15, valve disc; 16, valve disc ceramic sealing ring; 17, spring; 18. Stem hole.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, but not all of the embodiments.

In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", " Rear, Left, Right, Vertical, Horizontal, Top, Bottom, Inner, Outer, Clockwise, Counterclockwise, Axial, The orientations or positional relationships indicated by "radial direction", "circumferential direction", etc. are based on the orientations or positional relationships shown in the accompanying drawings, which are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying the indicated devices or elements. It must have a specific orientation, be constructed and operate in a specific orientation, and therefore should not be construed as a limitation of the present invention.

In the present invention, unless otherwise expressly specified and limited, terms such as "arrangement", "installation", "connection", "connection" and "fixation" should be understood in a broad sense, for example, it may be a fixed connection or a It is a detachable connection; it can be a mechanical connection; it can be directly connected or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

In addition, the terms "first", "second", etc. are used for descriptive purposes only, and should not be construed as indicating or implying relative importance or implying the number of indicated technical features. Thus, a feature defined as "first" or "second" may expressly or implicitly include one or more of that feature. In the description of the present invention, "plurality" means two or more, unless otherwise expressly and specifically defined.

Please refer to Figures 1-5, the present invention provides a technical solution:

A ceramic sealed vertical check valve, comprising a valve body 1, an upper valve cover 3 is fixedly connected to the upper surface of the valve body 1, the upper valve cover 3 is convex, and a plurality of first threads are opened on the upper valve cover 3 Hole 4, a plurality of first threaded holes 4 are distributed in an annular array with respect to the water outlet 2, the water outlet 2 is opened in the middle of the upper valve cover 3, the lower surface of the valve body 1 is fixedly connected with a lower valve cover 5, The lower surface is provided with a plurality of second threaded holes 6, and the plurality of second threaded holes 6 are distributed in an annular array with respect to the water inlet 7. The middle of the lower valve cover 5 is provided with a water inlet 7, and the inner wall of the lower end of the valve body 1 is fixedly connected with a valve. Seat 8, the valve seat 8 is located above the lower valve cover 5, the valve seat 8 is in the shape of a boss, the inside of the valve seat 8 is provided with a through hole, the through hole is communicated with the water inlet 7, and the valve seat 8 is convex and protruding The upper surface of the valve seat 8 is inlaid with a valve seat ceramic sealing ring 9, the upper surface of the valve seat ceramic sealing ring 9 is provided with a groove, a fixed plate 10 is arranged above the valve seat 8, and the outer surface of the fixed plate 10 is fixed A plurality of fixing columns 11 are connected, and the plurality of fixing columns 11 are distributed in an annular array, and the fixing columns 11 are in contact with the inner wall of the arc of the valve body 1. The end of the fixing column 11 away from the fixing plate 10 is fixedly connected to the inner wall of the upper end of the valve body 1. , the middle of the fixed plate 10 is provided with a valve stem hole 18, the inner wall of the valve stem hole 18 is fixedly connected with a guide sleeve 14, the inside of the guide sleeve 14 is slidably connected with a valve stem 12, and the upper surface of the valve stem 12 is fixedly connected with the limit block 13 , the position where the limit block 13 contacts the fixed plate 10 is provided with a rubber layer, and the size of the limit block 13 is larger than the size of the valve stem hole 18. By setting the limit block 13 on the upper surface of the valve stem 12, when the water outlet 2 pressure When the pressure of the water inlet 7 is greater than that of the water inlet 7, the valve disc 15 moves to the valve seat 8 under the water pressure difference. When the limit block 13 is in conflict with the fixed plate 10, the valve disc ceramic sealing ring 16 is just tight with the valve seat ceramic sealing ring 9 Fitting, the rubber layer is fixedly connected at the position where the limit block 13 is in contact with the fixed plate 10, which effectively reduces the impact between the limit block 13 and the fixed plate 10, and the lower surface of the valve stem 12 is fixedly connected with the valve flap 15, the valve flap 15 In the shape of a circular boss, the cross section of the valve disc 15 is in the shape of an inverted trapezoid. The lower surface of the valve disc ceramic sealing ring 16 is fixedly connected with a boss, the boss is matched with the groove, the groove and the boss are in the shape of a ring, and the boss is made of ceramic, and the outer surface of the valve stem 12 is sleeved with a Spring 17, the spring 17 is a return spring, and the spring 17 is a stainless steel wire spring, the upper surface of the spring 17 is fixedly connected with the lower surface of the fixed disc 10, and the lower surface of the spring 17 is fixedly connected with the upper surface of the valve disc 15. The lower surface of the disc 15 is inlaid with the valve disc ceramic sealing ring 16 and fixedly connected to the boss on its lower surface. The grooves are matched to improve the wear resistance and sealing performance of the valve disc 15 and the valve seat 8. Because the ceramic has high strength and corrosion resistance, the service life of the check valve is improved.

Working principle, this ceramic sealed vertical check valve, when the water inlet valve is opened, the water first passes through the valve seat 8, since the water pressure inside the valve seat 8 is greater than the water pressure outside the valve seat 8, the valve disc 15 overcomes the water pressure difference The resistance of the spring 17 moves upward, so that the valve disc 15 drives the valve stem 12 to slide upward in the guide sleeve 14 . At this time, water flows upward from the inside of the valve seat 8 , and the water bypasses the opened valve disc 15 and passes between the plurality of fixed columns 11 . The gap flows to outlet 2. When the water inlet valve is closed, the water will flow back downward. When the water pressure of the water inlet 7 is lower than that of the water outlet 2, the spring 17 pushes the valve disc 15 to the valve seat 8. When the rubber layer on the lower surface of the limit block 13 and the fixed plate When the 10 is in contact, the boss enters the groove at this time, and the valve disc ceramic sealing ring 16 is closely fitted with the valve seat ceramic sealing ring 9 to prevent the medium from flowing back and play a check function. Because the upper surface of the valve disc 15 is larger than the lower surface When the water passes through the upper surface of the valve disc 15 , the water will first flow upward and then disperse and flow downward, so as to ensure that the water will not flow into the valve seat 8 .

The above description is only a preferred embodiment of the present invention, but the protection scope of the present invention is not limited to this. The equivalent replacement or change of the inventive concept thereof shall be included within the protection scope of the present invention.

Claims (7)

1. A ceramic-sealed vertical check valve, comprising a valve body (1), characterized in that an upper valve cover (3) is fixedly connected to the upper surface of the valve body (1), and the upper valve cover (3) A water outlet (2) is opened in the middle of the valve body (1), a lower valve cover (5) is fixedly connected to the lower surface of the valve body (1), and a water inlet (7) is opened in the middle of the lower valve cover (5). A valve seat (8) is fixedly connected to the inner wall of the lower end of the valve body (1), the valve seat (8) is convex and the protruding part is upward, and the upper surface of the valve seat (8) is inlaid with valve seat ceramics A sealing ring (9), a groove is formed on the upper surface of the valve seat ceramic sealing ring (9), a fixed disk (10) is arranged above the valve seat (8), and the outer surface of the fixed disk (10) is provided A plurality of fixing columns (11) are fixedly connected on the surface, one end of the fixing column (11) away from the fixing plate (10) is fixedly connected with the inner wall of the upper end of the valve body (1), and the middle part of the fixing plate (10) is provided with A valve stem hole (18), the inner wall of the valve stem hole (18) is fixedly connected with a guide sleeve (14), the inside of the guide sleeve (14) is slidably connected with a valve stem (12), the valve stem (12) ) is fixedly connected to the upper surface of the limiting block (13), the lower surface of the valve stem (12) is fixedly connected with a valve flap (15), and the lower surface of the valve flap (15) is inlaid with a valve flap ceramic sealing ring ( 16), the lower surface of the valve disc ceramic sealing ring (16) is fixedly connected with a boss, the boss is adapted to the groove, and the outer surface of the valve stem (12) is sleeved with a spring (17) , the upper surface of the spring (17) is fixedly connected with the lower surface of the fixing plate (10), and the lower surface of the spring (17) is fixedly connected with the upper surface of the valve flap (15). 2. A ceramic seal vertical check valve according to claim 1, characterized in that, The upper valve cover (3) has a convex shape, a plurality of first threaded holes (4) are opened on the upper valve cover (3), and the plurality of first threaded holes (4) are related to the water outlet (2). ) are distributed in a circular array. 3. A ceramic seal vertical check valve according to claim 1, characterized in that, The lower surface of the lower valve cover (5) is provided with a plurality of second threaded holes (6), and the plurality of second threaded holes (6) are distributed in an annular array with respect to the water inlet (7). 4. A ceramic seal vertical check valve according to claim 1, characterized in that, The valve seat (8) is located above the lower valve cover (5), the valve seat (8) is in the shape of a boss, and a through hole is opened inside the valve seat (8), and the through hole is connected to the water inlet. (7) Connectivity. 5. A ceramic seal vertical check valve according to claim 1, characterized in that, A plurality of the fixing columns (11) are distributed in an annular array, and the fixing columns (11) are in contact with the arc inner wall of the valve body (1), and the position where the limiting block (13) is in contact with the fixing plate (10) is set Has a rubber layer. 6. A ceramic seal vertical check valve according to claim 1, characterized in that, The valve disc (15) is in the shape of a circular boss, the cross-section of the valve disc (15) is in the shape of an inverted trapezoid, and the valve disc ceramic sealing ring (16) is in close contact with the valve seat ceramic sealing ring (9). combine. 7. A ceramic seal vertical check valve according to claim 1, characterized in that, Both the groove and the boss are in the shape of a ring, and the boss is made of ceramics, the spring (17) is a return spring, and the spring (17) is a stainless steel wire spring, and the size of the limit block (13) is larger than The size of the stem hole (18).

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