Valve

Abstract

The valve comprises a valve deck, a valve body, a valve element and a valve rod, the valve element is located in the valve body, the end, penetrating into the valve body, of the valve rod is connected with the valve element, a valve port is formed in the valve body, and the valve element is used for sealing the valve port; a sealing lip edge is arranged on the edge of the end, close to the valve port, of the valve element and composed of a wave crest part and a wave trough part which are connected, and a wave-shaped groove matched with the sealing lip edge is formed in the edge of the valve port. A sealing conical surface is formed on the outer edge of the sealing lip edge, the cone angle of the sealing conical surface faces the valve port, and a conical groove matched with the sealing conical surface is formed in the outer edge of the corrugated groove. A cross valve clack is arranged at the bottom of the valve core; when the valve element seals the valve port, the inner wall of the wave-shaped groove is attached to the sealing lip edge. The sealing conical face is attached to the inner wall of the conical groove, and the cross valve clack is attached to the inner circumferential face of the valve port. The sealing performance and the sealing reliability of the interior of the valve are improved, and higher applicability to different application environments is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of valves, in particular to a valve. Background Art

[0002] A valve is a device used to control the direction, pressure and flow of fluid in a fluid system. It is a device that allows the medium in pipes and equipment to flow or stop and can control its flow. An existing commonly used valve mainly includes a valve body, a valve stem, a valve core and a valve cover. The valve cover is installed on the top of the valve body. The valve stem is inserted into the valve body and the valve cover. The top of the valve stem is connected to the valve core. A valve port is formed in the valve body. The valve core is used to close the valve port to open and close the valve. The sealing performance of the valve is crucial to the realization of its function. The existing valve sealing structure is single. When affected by factors such as fluid impact, temperature and pressure, its sealing reliability is poor, and fluid medium leakage is prone to occur. Utility Model Content

[0003] In order to solve the above technical problems, the utility model provides a valve, which can improve the sealing performance and sealing reliability inside the valve and has stronger applicability to different application environments.

[0004] The technical solution adopted by the utility model to solve its technical problems is: a valve, comprising a valve cover, a valve body, a valve core and a valve stem, the valve core is located in the valve body, one end of the valve stem penetrates into the valve body and is connected to the valve core, a valve port is formed in the valve body, and the valve core is used to close the valve port; a sealing lip is provided at the edge of one end of the valve core close to the valve port, the sealing lip is composed of connected wave crests and wave troughs, and a corrugated groove matched with the sealing lip is provided at the edge of the valve port; a sealing cone is formed at the outer edge of the sealing lip, the cone angle of the sealing cone faces the valve port, and a conical groove matched with the sealing cone is provided at the outer edge of the corrugated groove; a cross valve flap is provided at the bottom of the valve core; when the valve core closes the valve port, the inner wall of the corrugated groove fits with the sealing lip; the sealing cone fits with the inner wall of the conical groove, and the cross valve flap fits with the inner circumferential surface of the valve port.

[0005] Furthermore, the cross valve flap comprises two mutually perpendicular and integrally formed partitions, arc-shaped flaps are fixed to the ends of the partitions, and the cross valve flap is fitted to the inner circumferential surface of the valve port through the arc-shaped flaps.

[0006] Furthermore, a stuffing cavity is formed between the valve cover and the valve stem, and a sealing stuffing is arranged in the stuffing cavity. A pressure cover is installed on the valve cover, and the pressure cover is tightly pressed against the top wall of the sealing stuffing; a sealing cone plug is arranged at one end of the valve cover close to the valve body, and the sealing cone plug is slidably sleeved on the valve stem, and an elastic member is arranged on the bottom surface of the sealing cone plug away from the valve cover, and the sealing cone plug is connected to the top wall of the valve core through the elastic member.

[0007] Furthermore, a sealing ring is provided on the top of the valve core, the sealing ring is sleeved outside the valve stem, and the sealing cone plug is located inside the sealing ring, and the inner circumference of the sealing ring is in contact with the outer circumference of the sealing cone plug.

[0008] Furthermore, a ring groove for inserting a sealing ring is formed at one end of the valve cover close to the valve body.

[0009] Beneficial effects of the utility model:

[0010] When the valve sealing mechanism of the present application closes the valve port through the valve core, the sealing cone surface fits tightly against the inner wall of the cone groove to achieve the first layer of sealing; the sealing lip edge fits tightly against the inner wall of the corrugated groove to achieve the second layer of sealing and increase the sealing path; and the outer peripheral surface of the cross valve disc fits tightly against the inner peripheral surface of the valve port to achieve the third layer of sealing, which can reduce the possibility of local leakage of the valve port; through the three-layer sealing structure setting, the sealing effect of the valve core on the valve port can be effectively improved, and it has stronger applicability to different application environments. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a sectional view of the overall structure of the utility model.

[0012] Figure 2 yes Figure 1 A partial enlarged view of area A in the middle.

[0013] Figure 3 yes Figure 1 A partial enlarged view of area B in the middle.

[0014] Figure 4 It is a structural schematic diagram of the valve core in the utility model.

[0015] In the figure: 1. valve cover; 11. gland; 12. sealing packing; 13. ring groove; 2. valve body; 21. valve port; 22. corrugated groove; 23. cone groove; 3. valve core; 31. sealing lip; 32. sealing cone surface; 33. cross valve disc; 331. partition; 332. arc-shaped disc; 34. sealing cone plug; 35. elastic member; 36. sealing ring; 4. valve stem. DETAILED DESCRIPTION

[0016] Now the utility model is further described in detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, which only illustrate the basic structure of the utility model in a schematic manner, and therefore only show the components related to the utility model.

[0017] The utility model discloses a valve.

[0018] Reference Figures 1 to 4A valve comprises a valve cover 1, a valve body 2, a valve core 3 and a valve stem 4. The valve core 3 is located in the valve body 2. One end of the valve stem 4 penetrates into the valve body 2 and is connected to the valve core 3. A valve port 21 is formed in the valve body 2. The valve core 3 is used to close the valve port 21. A sealing lip 31 is arranged at the edge of one end of the valve core 3 close to the valve port 21. The sealing lip 31 is composed of a connected wave crest part and a wave trough part. A wave cap adapted to the sealing lip 31 is provided at the edge of the valve port 21. shaped groove 22; a sealing cone 32 is formed on the outer edge of the sealing lip 31, the cone angle of the sealing cone 32 faces the valve port 21, and a cone groove 23 adapted to the sealing cone 32 is formed on the outer edge of the corrugated groove 22; a cross valve flap 33 is provided at the bottom of the valve core 3; when the valve core 3 closes the valve port 21, the inner wall of the corrugated groove 22 fits with the sealing lip 31; the sealing cone 32 fits with the inner wall of the cone groove 23, and the cross valve flap 33 fits with the inner circumferential surface of the valve port 21.

[0019] When the valve sealing mechanism of the present application closes the valve port 21 through the valve core 3, the sealing cone surface 32 is tightly fitted against the inner wall of the cone groove 23 to achieve the first layer of sealing; the sealing lip edge 31 is tightly fitted against the inner wall of the corrugated groove 32 to achieve the second layer of sealing and increase the sealing path; and the outer peripheral surface of the cross valve flap 33 is tightly fitted against the inner peripheral surface of the valve port 21 to achieve the third layer of sealing, which can reduce the possibility of local leakage of the valve port 21; through the three-layer sealing structure setting, the sealing effect of the valve core 3 on the valve port 21 can be effectively improved, and it has stronger applicability to different application environments.

[0020] Reference Figure 4 The cross valve flap 33 includes two mutually perpendicular integrally formed partitions 331, and an arc-shaped flap 332 is fixed to the end of the partition 331. The cross valve flap 33 is fitted with the inner circumference of the valve port 21 through the arc-shaped flap 332. The provision of the arc-shaped flap 332 can increase the contact area between the cross valve flap 33 and the valve port 21, improve the structural strength and impact resistance of the valve core 3, and reduce the possibility of local leakage of the valve port 21.

[0021] Reference Figure 3 A packing cavity is formed between the valve cover 1 and the valve stem 4, and a sealing packing 12 is arranged in the packing cavity. In this embodiment, the sealing packing 12 is made of polytetrafluoroethylene impregnated asbestos packing. A gland 11 is bolted to the valve cover 1, and the bottom end of the gland 11 extends into the packing cavity and abuts against the top wall of the sealing packing 12. The sealing packing 12 is used to seal the valve stem 4 to prevent the fluid medium from flowing out of the gap between the valve stem 4 and the valve cover 1.

[0022] The end of the valve cover 1 close to the valve body 2 is provided with a sealing cone plug 34, which is slidably sleeved on the valve stem 4, and the bottom surface of the sealing cone plug 34 away from the valve cover 1 is provided with an elastic member 35, and the sealing cone plug 34 is connected to the top wall of the valve core 3 through the elastic member 35. In this embodiment, the elastic member 35 is a spring, and when the valve core 3 closes the valve port 21, the elastic member 35 is still in a compressed state, so the sealing cone plug 34 is always pressed against the front end of the connection between the valve cover 1 and the valve stem 4 under the action of the elastic member 35, and can effectively improve the sealing between the valve stem 4 and the valve cover 1 in cooperation with the sealing packing 12.

[0023] A sealing ring 36 is provided on the top of the valve core 3. The sealing ring 36 is sleeved outside the valve stem 4, and the sealing cone plug 34 is located inside the sealing ring 36. The inner circumference of the sealing ring 36 is in contact with the outer circumference of the sealing cone plug 34. The end of the valve cover 1 close to the valve body 2 is provided with a ring groove 13 for the sealing ring 36 to be inserted. When the valve core 3 moves upward until the sealing cone plug 34 is in contact with the inner circumference of the sealing ring 36 and is inserted into the ring groove 13, the sealing ring 36 has the effect of blocking the fluid medium outside the sealing cone plug 34, which can reduce the possibility of the fluid medium penetrating into the gap between the sealing cone plug 34 and the valve, thereby improving the sealing performance between the valve stem 4 and the valve cover 1.

[0024] Based on the above ideal embodiments of the utility model, the relevant staff can make various changes and modifications without deviating from the technical concept of the utility model through the above description. The technical scope of the utility model is not limited to the content of the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. A valve, comprising a valve cover (1), a valve body (2), a valve core (3) and a valve stem (4), wherein the valve core (3) is located in the valve body (2), one end of the valve stem (4) penetrates into the valve body (2) and is connected to the valve core (3), a valve port (21) is formed in the valve body (2), and the valve core (3) is used to close the valve port (21); characterized in that: The edge of one end of the valve core (3) close to the valve port (21) is provided with a sealing lip (31), the sealing lip (31) is composed of a connected wave crest portion and a wave trough portion, and the edge of the valve port (21) is provided with a corrugated groove (22) adapted to the sealing lip (31); the outer edge of the sealing lip (31) is formed with a sealing cone surface (32), the cone angle of the sealing cone surface (32) faces the valve port (21), and the outer edge of the corrugated groove (22) is provided with a conical groove (23) adapted to the sealing cone surface (32); the bottom of the valve core (3) is provided with a cross valve flap (33); when the valve core (3) closes the valve port (21), the inner wall of the corrugated groove (22) is in contact with the sealing lip (31); the sealing cone surface (32) is in contact with the inner wall of the conical groove (23), and the cross valve flap (33) is in contact with the inner peripheral surface of the valve port (21).

2. A valve according to claim 1, characterized in that: The cross valve flap (33) comprises two mutually perpendicular and integrally formed partitions (331), an arc-shaped flap (332) is fixed to the end of the partition (331), and the cross valve flap (33) is fitted to the inner circumferential surface of the valve port (21) via the arc-shaped flap (332).

3. A valve according to claim 1 or 2, characterized in that: A stuffing cavity is formed between the valve cover (1) and the valve stem (4), and a sealing stuffing (12) is arranged in the stuffing cavity. A pressure cover (11) is installed on the valve cover (1), and the pressure cover (11) is tightly pressed against the top wall of the sealing stuffing (12); a sealing cone plug (34) is arranged at one end of the valve cover (1) close to the valve body (2), and the sealing cone plug (34) is slidably sleeved on the valve stem (4); an elastic member (35) is arranged on the bottom surface of the sealing cone plug (34) away from the valve cover (1), and the sealing cone plug (34) is connected to the top wall of the valve core (3) through the elastic member (35).

4. A valve according to claim 3, characterized in that: A sealing ring (36) is arranged on the top of the valve core (3), the sealing ring (36) is sleeved outside the valve stem (4), and the sealing cone plug (34) is located inside the sealing ring (36), and the inner circumference of the sealing ring (36) is in contact with the outer circumference of the sealing cone plug (34).

5. A valve according to claim 4, characterized in that: An annular groove (13) for inserting a sealing ring (36) is provided at one end of the valve cover (1) close to the valve body (2).

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