Anti-scouring regular blowdown drain valve

Abstract

One side of a valve body is provided with a medium inlet, the bottom of the valve body is further provided with a medium outlet, the bottom of a valve cavity of the valve body is further provided with a valve seat penetrating through the medium outlet, the valve seat protrudes out of the bottom of the valve cavity, and the connecting position between the valve seat and the valve cavity is in a frustum shape. The top of the valve seat is provided with double seals and fixed to the bottom of the valve cavity through an anti-scouring sleeve, the lower end of the floating valve element is further provided with a cylinder used for being inserted into the valve seat, the valve rod above the floating valve element is further provided with a slow flow cover, and the lower end of the slow flow cover extends to the periphery of the floating valve element and is provided with an inverted bowl-shaped concave hole. The check valve can effectively relieve scouring and jamming of components in the valve body caused by media, guarantees leakproofness of the valve, reduces maintenance and repair amount, and avoids resource waste.

Description

Technical Field

[0001] The utility model relates to an anti-scouring periodic sewage drain valve. Background Art

[0002] The conventional periodic sewage trap is installed vertically with high inlet and low outlet. During long-term use, the steam trap is severely eroded and stuck by impurities due to the pressure differential of the steam drum and the presence of impurities in the medium, resulting in serious internal leakage of the trap and a waste of resources. Utility Model Content

[0003] The purpose of the utility model is to overcome the deficiencies of the above-mentioned prior art and provide a new type of anti-scour periodic sewage drain valve, which is suitable for use in a steam drum periodic sewage discharge system, can ensure valve tightness, reduce maintenance and overhaul, and avoid waste of resources.

[0004] The technical solution of the utility model is: an anti-scour periodic sewage drain valve, comprising a valve body, a valve cover and a valve stem, a floating valve core fixed to the bottom of the valve stem, a medium inlet provided on one side of the valve body, a medium outlet provided at the bottom of the valve body, and a valve seat corresponding to the floating valve core and penetrating the medium outlet provided at the bottom of the valve cavity of the valve body;

[0005] The valve seat is protruding from the bottom of the valve cavity. The connection between the valve seat and the valve cavity is in the shape of a frustum. The top of the valve seat has a flat seal. The valve seat below the flat seal is also provided with a conical seal. The valve seat at the lower end of the conical seal also has a through hole that passes through the medium outlet. The valve seat is fixed to the bottom of the valve cavity by an anti-scouring sleeve.

[0006] The upper end of the floating valve core has a sealing end corresponding to the plane seal and the conical seal, and the lower end of the floating valve core also has a cylinder corresponding to the through hole. When the valve is closed, the sealing end cooperates with the plane seal and the conical seal, and the cylinder is inserted and fitted into the through hole;

[0007] A flow control cover is also provided on the valve stem above the floating valve core. The flow control cover is an elastic solid cover body. The upper end of the flow control cover is fixed to the lower end of the valve stem, and the lower end of the flow control cover extends to the outer periphery of the floating valve core. The bottom of the flow control cover also has an inverted bowl-shaped concave hole. When the valve is closed, the bottom of the flow control cover is buckled on the outer periphery of the valve seat, forming a bent channel with the frustum at the connection between the valve seat and the valve cavity, so as to slow down the impact of the medium on the sealing surface of the valve seat and the floating valve core when the valve is opened.

[0008] Specifically, the valve body is an integral free forging structure.

[0009] Specifically, the anti-scour sleeve is threaded into the valve cavity.

[0010] Specifically, the slow flow cover is fixed on the valve stem through an upper locking plate and a lower locking plate respectively.

[0011] Furthermore, a plurality of anti-jamming and flow-guiding convex strips are arranged in an array on the lower end of the floating valve core, and a groove corresponding to each convex strip is provided in the through hole of the valve seat.

[0012] Furthermore, the valve stem is provided with an inverted seal.

[0013] Furthermore, a packing gland is fixed on the valve stem above the valve cover, and packing is provided between the valve cover and the packing gland.

[0014] Specifically, the filler consists of an upper alloy wire braided flexible graphite layer, a reinforced flexible graphite layer and a lower alloy wire braided flexible graphite layer.

[0015] Furthermore, a spring washer is provided at the connection between the valve stem and the packing gland.

[0016] Specifically, the valve stem and the floating valve core are a split-ring threaded fastening structure.

[0017] The beneficial effects of the utility model are as follows: the utility model can effectively alleviate the scouring and jamming of the internal components of the valve body by the medium through the design of the medium flow direction in the valve cavity, the matching plug-in valve core and valve cover structure design and the slow flow cover structure design, ensure the tightness of the valve, reduce the maintenance and repair amount, and avoid waste of resources. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural diagram of the utility model;

[0019] Figure 2 This is a structural diagram of the floating valve core of the utility model;

[0020] Figure 3 It is a structural schematic diagram of the valve seat of the utility model.

[0021] In the figure: valve body 1, valve cover 2, valve stem 3, floating valve core 4, medium inlet 5, medium outlet 6, valve seat 7, flat seal 8, conical seal 9, through hole 10, anti-scour sleeve 11, sealing end 12, cylinder 13, slow flow cover 14, anti-stuck guide ridge 15, groove 16, packing gland 18, packing 19. DETAILED DESCRIPTION

[0022] The technical solution of the present invention will be further specifically described below with reference to embodiments and in conjunction with the accompanying drawings.

[0023] Combine Figure 1-3As shown, an anti-scour periodic sewage drain valve includes a valve body 1, a valve cover 2 and a valve stem 3. A floating valve core 4 is fixed to the bottom of the valve stem 3. The floating valve core 4 has the function of automatic alignment and sealing.

[0024] A medium inlet 5 is provided on one side of the valve body 1, a medium outlet 6 is provided at the bottom of the valve body 1, and a valve seat 7 corresponding to the floating valve core 4 and penetrating the medium outlet 6 is provided at the bottom of the valve cavity of the valve body 1;

[0025] The valve seat 7 is provided protruding from the bottom of the valve cavity. The connection between the valve seat 7 and the valve cavity is in the shape of a frustum. This structure can effectively protect the sealing surface of the valve seat 7 and reduce direct erosion of the sealing surface by the medium. The top of the valve seat 7 is provided with a flat seal 8. The valve seat 7 below the flat seal 8 is also provided with a conical seal 9. The valve seat 7 at the lower end of the conical seal 9 is also provided with a through hole 10 that passes through the medium outlet 6. The double sealing structure can ensure the sealing level of the valve. The valve seat 7 is fixed to the bottom of the valve cavity by an anti-scouring sleeve 11 to improve the reliability of the valve seat 7 fixation and reduce the scouring of the edge of the valve seat 7 by the medium.

[0026] The upper end of the floating valve core 4 has a sealing end 12 corresponding to the flat seal 8 and the conical seal 9, and the lower end of the floating valve core 4 also has a cylindrical body 13 corresponding to the through hole 10. When the valve is closed, the sealing end 12 cooperates with the flat seal 8 and the conical seal 9, and the cylindrical body 13 is inserted and fitted into the through hole 10, so as to further improve the sealing performance when the valve is closed;

[0027] A slow-flow cover 14 is also provided on the valve stem 3 above the floating valve core 4. The slow-flow cover 14 is an elastic solid cover. The upper end of the slow-flow cover 14 is fixed to the lower end of the valve stem 3, and the lower end of the slow-flow cover 14 extends to the outer periphery of the floating valve core 4. The bottom of the slow-flow cover 14 also has an inverted bowl-shaped concave hole. When the valve is closed, the bottom of the slow-flow cover 14 is buckled and placed on the outer periphery of the valve seat 7, forming a bent channel with the frustum at the connection between the valve seat 7 and the valve cavity, so as to slow down the impact of the medium on the sealing surface of the valve seat 7 and the floating valve core 4 when the valve is opened.

[0028] Specifically, in order to improve the pressure resistance and prevent the valve body 1 from leaking out, the valve body 1 is an integral free forging structure, which can effectively avoid the risk of valve leakage.

[0029] Specifically, such as Figure 1 As shown, in order to ensure the reliability of fixing the anti-scour sleeve 11, the anti-scour sleeve 11 is screwed into the valve cavity.

[0030] Specifically, the slow flow cover 14 is fixed on the valve stem 3 through an upper locking piece and a lower locking piece respectively;

[0031] Further, combined Figure 2 and Figure 3As shown, a plurality of anti-jamming guide ridges 15 are arranged on the lower end of the floating valve core 4, and a groove 16 corresponding to each ridge is provided in the through hole 10 of the valve seat 7.

[0032] In another embodiment, in order to better correspond to the operating characteristics of the fixed-discharge hydrophobic high pressure difference and eliminate the risk of medium leakage from the valve stem 3, the valve stem 3 is further provided with an inverted seal.

[0033] In another embodiment, Figure 1 As shown, a packing gland 18 is fixed on the valve stem 3 above the valve cover 2, and a packing 19 is provided between the valve cover 2 and the packing gland 18;

[0034] In another embodiment, the filler 19 is composed of an upper alloy wire braided flexible graphite layer, a reinforced flexible graphite layer, and a lower alloy wire braided flexible graphite layer;

[0035] Furthermore, a spring washer is provided at the connection between the valve stem 3 and the packing gland 18 , which has the function of real-time compensation for the packing of the packing gland 18 .

[0036] In another embodiment, in order to improve the comfort of replacing the floating valve core 4 and the valve stem 3 and prevent the valve stem 3 and the movable floating valve core 4 from falling off, the valve stem 3 and the floating valve core 4 are a split-ring threaded fastening structure, and there are no pins or welding processes inside the valve body 1.

Claims

1. A scour-resistant periodic drain valve, comprising a valve body (1), a valve cover (2) and a valve stem (3), wherein a floating valve core (4) is fixed to the bottom of the valve stem (3), and is characterized in that: A medium inlet (5) is provided on one side of the valve body (1), a medium outlet (6) is provided at the bottom of the valve body (1), and a valve seat (7) corresponding to the floating valve core (4) and penetrating the medium outlet (6) is provided at the bottom of the valve cavity of the valve body (1); The valve seat (7) is protruding from the bottom of the valve cavity, and the connection between the valve seat (7) and the valve cavity is in the shape of a cone. The top of the valve seat (7) is provided with a plane seal (8), and the valve seat (7) below the plane seal (8) is also provided with a conical seal (9). The valve seat (7) at the lower end of the conical seal (9) is also provided with a through hole (10) that passes through the medium outlet (6), and the valve seat (7) is fixed to the bottom of the valve cavity by an anti-scouring sleeve (11); The upper end of the floating valve core (4) has a sealing end (12) corresponding to the plane seal (8) and the conical seal (9), and the lower end of the floating valve core (4) also has a cylinder (13) corresponding to the through hole (10). When the valve is closed, the sealing end (12) cooperates with the plane seal (8) and the conical seal (9), and the cylinder (13) is inserted and fitted into the through hole (10); A flow-slowing cover (14) is also provided on the valve stem (3) above the floating valve core (4). The flow-slowing cover (14) is an elastic solid cover body. The upper end of the flow-slowing cover (14) is fixed to the lower end of the valve stem (3), and the lower end of the flow-slowing cover (14) extends to the outer periphery of the floating valve core (4). The bottom of the flow-slowing cover (14) also has an inverted bowl-shaped concave hole. When the valve is closed, the bottom of the flow-slowing cover (14) is buckled and placed on the outer periphery of the valve seat (7), forming a bent channel with the cone at the connection between the valve seat (7) and the valve cavity, so as to slow down the impact of the medium on the sealing surface of the valve seat (7) and the floating valve core (4) when the valve is opened.

2. The anti-scour periodic drain valve according to claim 1, characterized in that: The valve body (1) is an integral free forging structure.

3. The anti-scour periodic drain valve according to claim 2, characterized in that: The anti-scour sleeve (11) is screwed into the valve cavity.

4. The anti-scour periodic drain valve according to claim 3, characterized in that: The slow flow cover (14) is fixed on the valve stem (3) via an upper locking plate and a lower locking plate respectively.

5. The anti-scour periodic drain valve according to claim 4, characterized in that: The lower end of the floating valve core (4) is provided with a plurality of anti-jamming flow-guiding convex strips (15) in an array, and the through hole (10) of the valve seat (7) is provided with a groove (16) corresponding to each convex strip.

6. The anti-scour periodic drain valve according to claim 5, characterized in that: The valve stem (3) is also provided with an inverted seal.

7. The anti-scour periodic drain valve according to claim 6, characterized in that: A packing gland (18) is also fixed on the valve stem (3) above the valve cover (2), and a packing (19) is also provided between the valve cover (2) and the packing gland (18).

8. The anti-scouring periodic drain valve according to claim 7, characterized in that: The filler (19) consists of an upper alloy wire braided flexible graphite layer, a reinforced flexible graphite layer and a lower alloy wire braided flexible graphite layer.

9. The anti-scour periodic drain valve according to claim 8, characterized in that: A spring washer is also provided at the connection between the valve stem (3) and the packing gland (18).

10. The anti-scour periodic drain valve according to claim 9, characterized in that: The valve stem (3) and the floating valve core (4) are a split-ring thread fastening structure.

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