Fluorine-lined weir type diaphragm valve

Abstract

The utility model relates to the technical field of valves, in particular to a fluorine lining weir type diaphragm valve, a fluorine lining layer is further lined on the inner wall of a valve body, the fluorine lining layer wraps a weir type valve seat at the same time, the edge of the fluorine lining layer extends to the position between a valve cover and the valve body, and a cavity allowing a valve clack body to ascend and descend in a reciprocating mode is formed between the valve cover and a diaphragm. At least two first guide rods symmetrical along the valve rod are fixed to the inner wall of the valve deck, the two first guide rods are the same in structure, the axes of the two first guide rods are parallel to the valve rod, and at least two first guide holes allowing the first guide rods to be inserted therein are formed in the valve clack body. When the valve clack body ascends and descends in a reciprocating mode, the first guide rod and the first guide hole keep sliding relative to each other, the symmetrical guide mechanisms are arranged in the valve cover, accurate guide of the valve clack is achieved, and good sealing performance is guaranteed.

Description

TECHNICAL FIELD

[0001] The utility model relates to valve technical field especially is involved in a kind of fluorine-lined weir type diaphragm valve. BACKGROUND

[0002] Weir type diaphragm valve is a kind of fluid control equipment specially used for slurry, corrosive medium and high-purity chemical conveying, mainly applied to the slurry processing link in the fields such as chemical industry, flue gas desulfurization, electric power, the valve is sealed by elastic diaphragm to isolate fluid and driving component, solve the leakage problem of traditional valve, adopt direct current channel and chamberless structure design, effectively reduce slurry retention and particle accumulation.

[0003] But weir type diaphragm valve of prior art is easy to deflect when opening and closing, and then lead to diaphragm and weir type valve seat not enough close, not only will lead to the decrease of sealing property, contact area reduction also lead to stress concentration, accelerate the wear of diaphragm. UTILITY MODEL CONTENTS

[0004] The utility model discloses a fluorine-lined weir type diaphragm valve is provided to overcome the shortcomings and deficiencies of prior art, the utility model discloses symmetric guiding mechanism is arranged in valve cover, realize the accurate guidance of valve disc, guarantee good sealing property.

[0005] The utility model discloses the technical scheme as follows: a kind of fluorine-lined weir type diaphragm valve, including valve body, diaphragm, valve disc main body, valve stem, valve cover and driving mechanism, the weir type valve seat for being sealed with diaphragm is protruded in the valve body, the valve cover is connected with valve body flange, the diaphragm is clamped between valve cover and valve body, and the middle part of diaphragm is fixed on valve disc main body, the driving mechanism is driven valve disc main body reciprocating lifting by valve stem, simultaneously, the valve disc main body drives diaphragm reciprocating deformation, the inner wall of valve body is also lined with fluorine lining layer, the fluorine lining layer is wrapped weir type valve seat simultaneously, and the edge of fluorine lining layer extends between valve cover and valve body, the cavity for the reciprocating lifting of valve disc main body is formed between valve cover and diaphragm, the inner wall of valve cover is fixed with at least two first guide rods that are symmetric along valve stem, two the first guide rod structure is same and axis is all parallel with valve stem, at least two first guide holes for the insertion of first guide rod are provided on the valve disc main body, when the valve disc main body reciprocating lifting, the first guide rod and first guide hole keep relative sliding.

[0006] The valve disc main body includes upper valve disc and lower valve disc, the upper valve disc is connected with the lower valve disc by connecting assembly, the valve stem is connected with the upper valve disc, and the diaphragm is connected with the lower valve disc.

[0007] The connecting assembly comprises a mounting ring and a T-shaped block, the T-shaped block is fixed on the lower valve disc, the upper valve disc is provided with a movable hole for inserting the T-shaped block, the mounting ring is mounted on the edge of the movable hole through fasteners, and the T-shaped block is positioned in the movable hole through the mounting ring.

[0008] The first guide hole is arranged through the upper valve disc, the lower valve disc is provided with at least two second guide rods, the first guide rod is provided with a second guide hole at the end away from the valve cover, the second guide rod is inserted into the second guide hole along the first guide hole, and the second guide rod and the second guide hole also keep relative sliding when the valve disc body reciprocatingly rises and falls.

[0009] The first guide rod is provided with a ventilation hole communicating the second guide hole and the cavity.

[0010] At least two elastic members are further arranged in abutment between the upper valve disc and the lower valve disc.

[0011] Each elastic member is respectively sleeved on the corresponding second guide rod, and the first guide hole is provided with a clamping groove for embedding the end portion of the elastic member at the inner edge of the end close to the lower valve disc.

[0012] The beneficial effects of the utility model are as follows: the utility model sets up symmetrical guide mechanisms in the valve cover, that is, the first guide rod and the first guide hole keep relative sliding when the valve disc body reciprocatingly rises and falls, the precise guidance of the valve disc is realized, it is guaranteed that the diaphragm can be correctly attached to the weir type valve seat when the valve is closed, so that the sealing reliability is guaranteed, meanwhile, the diaphragm and the weir type valve seat can have a large enough contact area, stress concentration is prevented, the wear rate is greatly reduced, a fluorine lining layer is further lined in the inner wall of the valve body and the weir type valve seat, the edge of the fluorine lining layer further extends between the valve cover and the valve body, comprehensive protection is formed, fluid erosion is effectively resisted, and the utility model is suitable for the conveying of high corrosive media. BRIEF DESCRIPTION OF DRAWINGS

[0013] In order to more clearly illustrate the technical scheme in the embodiments of the utility model or the prior art, the drawings needed to be used in the following embodiment or prior art description will be briefly introduced, and obviously, the drawings in the following description are only some embodiments of the utility model, and for those skilled in the art, other drawings obtained according to these drawings without creative labor still belong to the scope of the utility model.

[0014] Figure 1 It is a structure schematic view of the utility model one fluorine-lined weir type diaphragm valve;

[0015] Figure 2 It is Figure 1 It is a local enlarged schematic view of A in the middle;

[0016] Figure 3 It isFigure 1 A magnified view of a portion of point B in the middle;

[0017] In the figure, 1-valve body, 2-diaphragm, 3-valve disc body, 4-valve stem, 5-valve cover, 6-drive mechanism, 7-weir type valve seat, 8-fluorine lining layer, 9-cavity, 10-first guide rod, 11-first guide hole, 12-upper valve disc, 13-lower valve disc, 14-mounting ring, 15-T-block, 16-moving hole, 17-fastener, 18-second guide rod, 19-second guide hole, 20-vent hole, 21-elastic element, 22-slot. Detailed Implementation

[0018] To make the objectives, technical solutions and advantages of this utility model clearer, the utility model will be described in further detail below with reference to the accompanying drawings.

[0019] It should be noted that all uses of "first" and "second" in the embodiments of this utility model are for the purpose of distinguishing two entities or parameters with the same name but different names. It is clear that "first" and "second" are only for the convenience of expression and should not be construed as limiting the embodiments of this utility model. Subsequent embodiments will not explain this in detail.

[0020] The directional and positional terms used in this utility model, such as "up," "down," "front," "back," "left," "right," "inner," "outer," "top," "bottom," and "side," are merely for reference to the accompanying drawings. Therefore, the directional and positional terms used are for the purpose of explaining and understanding this utility model, and not for limiting the scope of protection of this utility model.

[0021] like Figures 1 to 3 As shown in the figure, an embodiment of the present invention is disclosed: a fluoropolymer-lined weir-type diaphragm valve, comprising a valve body 1, a diaphragm 2, a valve disc body 3, a valve stem 4, a valve cover 5, and a drive mechanism 6. The valve body 1 has a weir-type valve seat 7 protruding within it for sealing with the diaphragm 2. The valve cover 5 is flanged to the valve body 1. The diaphragm 2 is sandwiched between the valve cover 5 and the valve body 1, with its center fixed to the valve disc body 3. The drive mechanism 6 drives the valve disc body 3 to reciprocate up and down via the valve stem 4, while simultaneously causing the diaphragm 2 to reciprocate and deform. The inner wall of the valve body 1 is also lined with a fluoropolymer lining layer 8. The fluoropolymer lining 8 simultaneously wraps the weir-type valve seat 7, and the edge of the fluoropolymer lining 8 extends to the space between the valve cover 5 and the valve body 1. A cavity 9 is formed between the valve cover 5 and the diaphragm 2 for the valve disc body 3 to reciprocate. At least two first guide rods 10 are fixed on the inner wall of the valve cover 5, which are symmetrical about the valve stem 4. The two first guide rods 10 have the same structure and their axes are parallel to the valve stem 4. The valve disc body 3 is provided with at least two first guide holes 11 for the first guide rods 10 to be inserted. When the valve disc body 3 reciprocates, the first guide rods 10 and the first guide holes 11 slide relative to each other.

[0022] The beneficial effects of such an arrangement are as follows: the valve cover is provided with symmetrical guide mechanisms, that is, the first guide rod and the first guide hole maintain relative sliding when the valve body reciprocates, thereby achieving precise guidance of the valve flap, ensuring that the diaphragm can correctly fit the weir valve seat when the valve is closed, thereby ensuring reliable sealing, while the diaphragm and the weir valve seat can have a large enough contact area, preventing stress concentration and greatly reducing the wear rate, and the valve body inner wall and the weir valve seat are lined with a fluorine layer, the edge of the fluorine layer extends between the valve cover and the valve body, forming comprehensive protection, effectively resisting fluid erosion, and being suitable for the transportation of highly corrosive media.

[0023] Further arrangement, the valve body 3 includes an upper valve flap 12 and a lower valve flap 13, the upper valve flap 12 is connected with the lower valve flap 13 through a connecting assembly, the valve rod 4 is connected with the upper valve flap 12, and the diaphragm 2 is connected with the lower valve flap 13.

[0024] The beneficial effects of such an arrangement are as follows: the valve flap adopts a split structure, which allows the easy-to-wear lower valve flap or diaphragm to be replaced individually without the need to replace the entire valve body and related driving components, significantly reducing maintenance costs and time, and allowing the driving action of the valve rod to be more smoothly transmitted to the lower valve flap through the upper valve flap and the connecting assembly, which helps to improve the force transmission path and cooperates with the guide rod to further ensure the centration of the lower valve flap and the diaphragm.

[0025] Further arrangement, the connecting assembly includes a mounting ring 14 and a T-shaped block 15, the T-shaped block 15 is fixed on the lower valve flap 13, the upper valve flap 12 is provided with a movable hole 16 for inserting the T-shaped block 15, the mounting ring 14 is mounted on the edge of the movable hole 16 through a fastener 17, and the T-shaped block 15 is limitingly arranged in the movable hole 16 through the mounting ring 14.

[0026] The beneficial effects of such an arrangement are as follows: the upper valve flap and the lower valve flap are connected together through the cooperation of the T-shaped block and the mounting ring, the T-shaped block slides in the movable hole, the upper valve flap and the lower valve flap can not only slide relative to each other but also will not be separated, and the centration of the upper valve flap and the lower valve flap can be ensured, and the fastener adopts a bolt that can be purchased in the prior art.

[0027] Further arrangement, the first guide hole 11 is provided through the upper valve flap 12, the lower valve flap 13 is provided with at least two second guide rods 18, the first guide rod 10 is provided with a second guide hole 19 at the end away from the valve cover 5, and the second guide rod 18 is inserted into the second guide hole 19 along the first guide hole 11, and the second guide rod 18 and the second guide hole 19 also maintain relative sliding when the valve body 3 reciprocates.

[0028] The beneficial effects of such an arrangement are as follows: by inserting the second guide rod into the second guide hole of the first guide rod, a nested guide structure is formed in which both the upper valve disc and the lower valve disc are constrained, the first guide rod guides the upper valve disc and also guides the lower valve disc, and the guiding accuracy is further improved.

[0029] Further, the first guide rod 10 is provided with a vent hole 20 that communicates the second guide hole 19 and the cavity 9.

[0030] The beneficial effects of such an arrangement are as follows: the closed space formed by the second guide hole and the second guide rod is prone to air cushion effect or vacuum, which causes resistance to movement, and the provision of the vent hole makes the pressure in the second guide hole and the cavity real-time balanced, eliminating air resistance or vacuum suction phenomenon, and ensuring smooth sliding of the valve disc.

[0031] Further, at least two elastic members 21 are arranged in abutment between the upper valve disc 12 and the lower valve disc 13.

[0032] The beneficial effects of such an arrangement are as follows: the elastic members always maintain a certain compression amount between the upper valve disc and the lower valve disc, and apply a continuous and stable positive pressure to the lower valve disc and the diaphragm, ensuring that the diaphragm and the weir valve seat can still be closely fitted even when the medium pressure fluctuates or the diaphragm is slightly worn, significantly improving the sealing reliability and stability of the valve, the elastic members can absorb part of the impact energy during the opening and closing process of the valve disc, so that the rigid drive of the valve rod is converted into flexible drive acting on the lower valve disc. This effectively buffers the impact force at the moment of opening and closing, protects the diaphragm and the lower valve disc, reduces vibration and noise, prolongs the service life of the key components, and the elastic members are springs that can be purchased using existing technology.

[0033] Further, each elastic member 21 is respectively sleeved on the corresponding second guide rod 18, and the first guide hole 11 is provided with a clamping groove 22 in the inner edge of one end near the lower valve disc 13 for embedding the end of the elastic member 21.

[0034] The beneficial effects of such an arrangement are as follows: the second guide rod supports the spring, preventing the spring from twisting and failing, and the end of the spring is also embedded in the clamping groove, further limiting and protecting the extension direction of the spring, and ensuring the stability of the valve during long-term operation.

[0035] The above only discloses preferred embodiments of the present application, and of course cannot limit the scope of the present application, so equivalent changes made according to the claims of the present application still fall within the scope of the present application.

Claims

1. A fluorine-lined weir diaphragm valve, comprising a valve body (1), a diaphragm (2), a valve clack body (3), a valve stem (4), a valve cover (5) and a driving mechanism (6), the valve body (1) is provided with a weir valve seat (7) in the inner convex for sealing cooperation with the diaphragm (2), the valve cover (5) is connected with the valve body (1) flange, the diaphragm (2) is clamped between the valve cover (5) and the valve body (1), and the middle part of the diaphragm (2) is fixed on the valve clack body (3), the driving mechanism (6) drives the valve clack body (3) to reciprocatingly lift through the valve stem (4), and the valve clack body (3) drives the diaphragm (2) to reciprocatingly deform, characterized in that: The inner wall of the valve body (1) is also lined with a fluorine lining layer (8), which wraps the weir valve seat (7) and the edge of the fluorine lining layer (8) extends between the valve cover (5) and the valve body (1), the cavity (9) for the reciprocal lifting of the valve disc body (3) is formed between the valve cover (5) and the diaphragm (2), the inner wall of the valve cover (5) is fixed with at least two first guide rods (10) which are symmetrical along the valve rod (4), the valve disc body (3) is provided with at least two first guide holes (11) for the insertion of the first guide rods (10), and the first guide rods (10) and the first guide holes (11) keep relative sliding when the valve disc body (3) reciprocally lifts. ​ 2. A fluoropolymer lined weir diaphragm valve according to claim 1, wherein: The valve disc body (3) comprises an upper valve disc (12) and a lower valve disc (13), the upper valve disc (12) is connected with the lower valve disc (13) through a connecting assembly, the valve rod (4) is connected with the upper valve disc (12), and the diaphragm (2) is connected with the lower valve disc (13).

3. A fluoropolymer lined weir diaphragm valve according to claim 2, wherein: The connecting assembly comprises a mounting ring (14) and a T-shaped block (15), the T-shaped block (15) is fixed on the lower valve disc (13), the upper valve disc (12) is provided with a movable hole (16) for the insertion of the T-shaped block (15), the mounting ring (14) is mounted on the edge of the movable hole (16) through a fastener (17), and the T-shaped block (15) is positioned in the movable hole (16) through the mounting ring (14).

4. A fluoropolymer lined weir diaphragm valve according to claim 2, wherein: The first guide hole (11) is provided on the upper valve disc (12), the lower valve disc (13) is provided with at least two second guide rods (18), the end of the first guide rod (10) away from the valve cover (5) is provided with a second guide hole (19), the second guide rod (18) is inserted into the second guide hole (19) along the first guide hole (11), and the second guide rod (18) and the second guide hole (19) also keep relative sliding when the valve disc body (3) reciprocally lifts.

5. A fluoropolymer lined weir diaphragm valve according to claim 4, wherein: The first guide rod (10) is provided with an air hole (20) which communicates the second guide hole (19) and the cavity (9).

6. A fluoropolymer lined weir diaphragm valve according to claim 4, wherein: At least two elastic members (21) are also arranged between the upper valve disc (12) and the lower valve disc (13).

7. A fluoropolymer lined weir diaphragm valve according to claim 6, wherein: Each elastic member (21) is respectively sleeved on the corresponding second guide rod (18), and the inner edge of the end of the first guide hole (11) close to the lower valve disc (13) is provided with a clamping groove (22) for the end of the elastic member (21) to be embedded.

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