Sealing anti-scouring stop valve

Abstract

The utility model provides a sealed anti-scour stop valve, which relates to the field of stop valves and comprises a valve body, a water inlet end and a water outlet end are respectively arranged at two ends of the valve body, a valve cover is connected to the upper end of the valve body, a valve seat is arranged in the valve body, a valve clack is arranged on the upper side of the valve seat, a valve rod is connected to the upper end of the valve clack, and the valve rod is connected with the valve cover. A protection part is arranged on the inner side of the valve body and fixed to the lower end of the valve deck, the lower end of the valve clack is connected with a sealing ring, a clamping groove is formed in the upper end of the valve seat, and the sealing ring corresponds to the clamping groove in the vertical direction. The anti-scouring check valve has comprehensive anti-scouring protection after the valve clack is opened, and has the effect of enhancing sealing.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of stop valve, concretely relates to a sealed anti-erosion stop valve. BACKGROUND

[0002] The stop valve is also called a gate valve, belongs to a forced sealing type valve, is widely used in systems such as a boiler and a steam turbine, and due to the valve structure, the valve disc and the valve seat of most domestic valves are prone to wear after being eroded by high-pressure fluid for a long time, thereby causing internal leakage of the valve, so a kind of anti-erosion stop valve is urgently needed to meet the use requirement of the valve in different working environments.

[0003] Through the search, the prior art (publication number: CN217271975U) records "a kind of anti-erosion stop valve, including valve body, the valve body is detachably connected with valve cover by bolt, the valve stem is movably connected with valve stem by packing, the valve stem is detachably connected with valve disc, the valve cover is equipped with wear-resistant sleeve, one end of the valve disc is arranged by wear-resistant sleeve and valve body, the valve body is equipped with valve seat, the other end of the valve disc is arranged by sealing element and valve seat cooperation.The utility model sets up wear-resistant sleeve, cooperates by the medium passage from top to bottom, can effectively reduce the influence of medium erosion on valve body;By setting sealing element, when the valve is closed, the worker drives the valve disc to descend by the valve stem, at this time, the lug gradually seals the step by the sealing pad, the compression ring on the side close to the lug of the valve disc is tightly sealed by the sliding ring in the groove, realizes the double sealing effect of the valve disc to the valve seat, effectively improves the sealing effect of the valve body."

[0004] Although the anti-erosion stop valve in the prior art achieves the effects of sealing and anti-erosion, there are still some deficiencies: the wear-resistant sleeve of the existing anti-erosion stop valve cannot protect the valve disc comprehensively when the valve disc is opened, that is, the wear-resistant sleeve cannot protect the valve disc comprehensively, and the sealing element involved is also subjected to erosion when the valve disc is opened, which easily leads to damage of the sealing element. UTILITY MODEL CONTENTS

[0005] In order to overcome the defects of the prior art, a kind of sealed anti-erosion stop valve is provided to solve the problems in the above background.

[0006] In order to achieve the above purpose, a kind of sealed anti-erosion stop valve is provided, which comprises: a valve body, the two ends of the valve body are respectively provided with a water inlet end and a water outlet end, and the upper end of the valve body is connected with a valve cover, the inside of the valve body is provided with a valve seat, and the upper side of the valve seat is provided with a valve disc, and the upper end of the valve disc is connected with a valve stem, the inside of the valve body is provided with a protection piece, and the protection piece is fixed at the lower end of the valve cover, the lower end of the valve disc is connected with a sealing ring, the upper end of the valve seat is provided with a clamping groove, and the upper and lower positions of the sealing ring and the clamping groove correspond.

[0007] Further, the inside of the valve seat is provided with a through hole, and the through hole is communicated with the water inlet end and the water outlet end, and the hole wall of the through hole is provided with an inclined step.

[0008] Further, the valve rod sliding output passes through the valve cover, and the lower end of the valve rod is rotationally connected with the valve flap.

[0009] Further, the lower end of the valve flap is connected with a mounting groove, and the sealing ring is embedded in the mounting groove, and a sealing block is arranged at the lower end of the valve flap.

[0010] Further, the outer side of the valve flap is provided with an outwardly protruding arc-shaped protrusion, and the protrusion is in contact with the protection piece when the valve flap is closed.

[0011] Further, the protection piece comprises a ceramic cylinder, and the inside of the ceramic cylinder is provided with a receiving cavity, and the inner diameter of the receiving cavity is greater than the outer diameter of the valve flap.

[0012] Further, the protection piece further comprises a honeycomb ceramic plate hinged at the lower end of the ceramic cylinder, and the side of the honeycomb ceramic plate away from the hinged end is provided with a magnetic block, and the inner wall of the side of the ceramic cylinder away from the hinged end is provided with a stop block.

[0013] The beneficial effects of the utility model lie in:

[0014] 1. When the valve body is closed, the valve flap moves downward to the valve seat, and the sealing block at the lower end of the valve flap is inserted into the through hole in the inside of the valve seat, and the sealing ring is clamped in the clamping groove, so that the sealing effect is enhanced by the sealing ring and the sealing block, and in the process of the valve flap descending, the arc-shaped protrusion on the outer side of the valve flap pushes the hinged honeycomb ceramic plate outward, and when the valve flap is opened, the honeycomb ceramic plate is turned over with the valve flap rising under the impact of the medium, until the magnetic block at one end of the honeycomb ceramic plate is adsorbed and limited by the stop block, and at this time, the honeycomb ceramic plate covers the bottom of the ceramic cylinder, so that the honeycomb ceramic plate with a porous structure can reduce the erosion of the medium to the bottom of the valve flap and the erosion of the sealing ring, thereby improving the overall protection of the valve flap and prolonging the service life of the sealing element.

[0015] 2. The ceramic cylinder and the receiving cavity of the protection piece are used to receive the valve flap in the receiving cavity when the valve flap is opened, so that the valve flap is protected from erosion by the ceramic cylinder made of ceramic material, and the honeycomb ceramic plate at the bottom of the valve flap also has the effect of wear resistance and corrosion resistance like the ceramic cylinder, thereby enhancing the comprehensiveness of the protection of the valve flap. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is a schematic diagram of the cross-sectional structure of the embodiment of the utility model.

[0017] Figure 2This is a schematic diagram of the valve disc opening according to an embodiment of the present invention.

[0018] Figure 3 This is an embodiment of the present utility model. Figure 1 Schematic diagram of the structure at point A in the middle.

[0019] Figure 4 This is a three-dimensional structural diagram of the protective component according to an embodiment of the present utility model.

[0020] In the diagram: 1. Valve body; 11. Inlet; 12. Outlet; 13. Valve cover; 14. Valve stem; 15. Valve disc; 151. Protrusion; 152. Mounting groove; 153. Sealing ring; 16. Protective component; 161. Ceramic cylinder; 162. Storage cavity; 163. Honeycomb ceramic plate; 164. Magnetic block; 17. Valve seat; 171. Snap-fit ​​groove. Detailed Implementation

[0021] Reference Figures 1 to 4 As shown, this utility model provides a sealing and erosion-resistant shut-off valve, including: a valve body 1, with an inlet end 11 and an outlet end 12 at both ends of the valve body 1, and a valve cover 13 connected to the upper end of the valve body 1; a valve seat 17 is provided inside the valve body 1, and a valve disc 15 is provided on the upper side of the valve seat 17, with a valve stem 14 connected to the upper end of the valve disc 15; a protective member 16 is provided on the inner side of the valve body 1, and the protective member 16 is fixed to the lower end of the valve cover 13; a sealing ring 153 is connected to the lower end of the valve disc 15; and a snap-fit ​​groove 171 is provided on the upper end of the valve seat 17, with the sealing ring 153 corresponding to the upper and lower positions of the snap-fit ​​groove 171.

[0022] In this embodiment, the valve body 1, valve cover 13, valve stem 14, valve seat 17, valve disc 15, and protective component 16 constitute the main structure of the sealing and erosion-resistant shut-off valve involved in this application.

[0023] Specifically, the inner channels of the inlet end 11 and the outlet end 12 are both coated with ceramic coating material to prevent the media from scouring the internal flow. In addition, the inner channels of the inlet end 11 and the outlet end 12 are both designed with arc-shaped flow channel structure to reduce the friction of the media flow.

[0024] like Figure 1 and Figure 3 In the valve seat 17, a through hole is provided inside, and the through hole is connected to the water inlet end 11 and the water outlet end 12. The inner wall of the through hole is provided with an inclined step. The valve stem 14 slides through the valve cover 13, and the lower end of the valve stem 14 is rotatably connected to the valve disc 15.

[0025] Specifically, the upper end of the valve rod 14 is connected with a screw rod, the upper end of the screw rod is connected with a handle or an electric driving device, and the handle and the electric driving device are arranged on the upper side of the valve cover 13, and a fixing frame is arranged on the upper end of the valve cover 13, so as to realize the screw connection of the screw rod and the fixing frame, thereby driving the lifting movement of the valve rod 14.

[0026] Specifically, the valve disc 15 is provided in a circular structure.

[0027] As Figures 1 to 4 Specifically, the lower end of the valve disc 15 is connected with a mounting groove 152, a sealing ring 153 is embedded in the mounting groove 152, a sealing block is arranged on the lower end of the valve disc 15, the outer side of the valve disc 15 is provided with an outwardly protruding arc-shaped protrusion 151, the protrusion 151 is in contact with the protection piece 16 when the valve disc 15 is closed, the protection piece 16 comprises a ceramic cylinder 161, the inside of the ceramic cylinder 161 is provided with a receiving cavity 162, the inner diameter of the receiving cavity 162 is greater than the outer diameter of the valve disc 15, the protection piece 16 further comprises a honeycomb ceramic plate 163 hinged to the lower end of the ceramic cylinder 161, the side of the honeycomb ceramic plate 163 away from the hinged end is provided with a magnetic attraction block 164, and a stop block is arranged on the inner wall of the side of the ceramic cylinder 161 away from the hinged end.

[0028] Specifically, the protrusion 151 on the outer side of the valve disc 15 is arranged around the outer circumference of the valve disc 15, so that when the valve disc 15 rotates, the protrusion 151 always contacts the honeycomb ceramic plate 163 during lifting.

[0029] Specifically, the magnetic attraction block 164 and the stop block are opposite magnets, which realize the attraction effect when they contact, and when the magnetic attraction block 164 contacts the stop block, the honeycomb ceramic plate 163 at this time keeps the bottom of the ceramic cylinder 161 blocked horizontally.

[0030] Specifically, the honeycomb ceramic plate 163 can also be provided in a solid ceramic plate structure, and the outer diameter of the solid ceramic plate matches the inner side flow channel of the water inlet end 11.

[0031] As another preferred embodiment, by providing the honeycomb ceramic plate 163 in a solid ceramic plate structure, when the valve disc 15 is closed, a blocking effect can be formed between the valve disc 15 and the water inlet end 11, thereby strengthening the sealing effect, and when the valve disc 15 is opened, the solid ceramic plate at this time realizes the complete blocking effect of the bottom of the valve disc 15, thereby strengthening the protection effect of the valve disc 15.

[0032] In use, when the valve body is closed, the valve disc moves downward to the valve seat, the sealing block at the lower end of the valve disc is inserted into the through hole in the valve seat, and the sealing ring is clamped in the clamping groove, so that the sealing effect is enhanced through the sealing ring and the sealing block; in the process of lowering the valve disc, the arc-shaped protrusions on the outer side of the valve disc push the hinged honeycomb ceramic plate outward; when the valve disc is opened, the honeycomb ceramic plate is turned over with the rising of the valve disc under the impact of the medium, and the magnetic block at one end of the honeycomb ceramic plate is adsorbed and limited by the stop block; at this time, the honeycomb ceramic plate covers the bottom of the ceramic cylinder, so that the honeycomb ceramic plate with a porous structure can reduce the erosion of the medium on the bottom of the valve disc and the erosion of the sealing ring, thereby improving the overall protection of the valve disc and prolonging the service life of the sealing element; the protection element includes the ceramic cylinder and the receiving cavity, so that the valve disc is received in the receiving cavity when the valve disc is opened; at this time, the ceramic cylinder made of ceramic material achieves the anti-erosion protection of the valve disc, and the honeycomb ceramic plate at the bottom of the valve disc has the same wear-resistant and corrosion-resistant effect as the ceramic cylinder, thereby enhancing the overall protection of the valve disc.

[0033] The sealing and anti-erosion stop valve can effectively solve the problems in the background art, and has the advantages of comprehensive anti-erosion protection after the valve disc is opened and enhanced sealing effect on the basis of the existing sealing and anti-erosion stop valve technology.

Claims

1. A seal against scouring stop valve, comprising: The utility model provides a valve body (1), water inlet end (11) and water outlet end (12) are equipped with respectively at both ends of the valve body (1), and the upper end of valve body (1) is connected with valve cover (13), its characterized in that: the inside of valve body (1) is equipped with valve seat (17), and the upper side of valve seat (17) is equipped with valve clapper (15), and the upper end of valve clapper (15) is connected with valve stem (14), the inside of valve body (1) is equipped with protection part (16), and protection part (16) is fixed in the lower end of valve cover (13), the lower end of valve clapper (15) is connected with sealing ring (153), and the upper end of valve seat (17) is equipped with clamping groove (171), and sealing ring (153) and the up and down position of clamping groove (171) correspond.

2. A seal-washed globe valve according to claim 1, wherein, The inside of the valve seat (17) is provided with a through hole, and the through hole is communicated with the water inlet end (11) and the water outlet end (12), and the inner hole wall of the through hole is provided with an inclined step.

3. A seal-washed globe valve according to claim 1, wherein, The valve stem (14) slides out through the valve cover (13), and the lower end of the valve stem (14) is rotatably connected with the valve clapper (15).

4. A seal-washed globe valve according to claim 1, wherein, The lower end of the valve clapper (15) is connected with a mounting groove (152), the sealing ring (153) is embedded in the mounting groove (152), and a sealing block is arranged at the lower end of the valve clapper (15).

5. A seal-washed globe valve according to claim 1, wherein, The outer side of the valve clapper (15) is provided with an outwardly protruding arc-shaped protrusion (151), and the protrusion (151) is in contact with the protection part (16) when the valve clapper (15) is closed.

6. A seal-washed globe valve according to claim 1, wherein, The protection part (16) comprises a ceramic cylinder (161), and the inside of the ceramic cylinder (161) is provided with a receiving cavity (162), and the inner diameter of the receiving cavity (162) is greater than the outer diameter of the valve clapper (15).

7. A seal-washed globe valve according to claim 1 wherein, The protection part (16) further comprises a honeycomb ceramic plate (163) hinged at the lower end of the ceramic cylinder (161), and a magnetic block (164) is arranged on the side of the honeycomb ceramic plate (163) away from the hinged end, and a stop block is arranged on the inner wall of the ceramic cylinder (161) away from the hinged end.

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