Double-guide hydraulic control valve

Abstract

The utility model discloses a double-guide hydraulic control valve, which relates to a pipeline valve controlled by water pressure, structurally comprises a valve body, a valve cover, a diaphragm, a valve clack, an elastic element and the like, and is mainly characterized in that a guide pipe is additionally arranged on the inner surface of the valve cover, a vertically mounted valve rod is arranged on the valve clack, and the upper end of the valve rod movably extends into the guide pipe; in this way, the valve clack can be guided to form lifting guide movement through telescopic movement of the valve rod in the guide pipe; meanwhile, an arc contact part is formed between the outer circumference of the diaphragm and the top of the valve body, and the valve clack is guided through the arc contact part to form lifting guide movement; therefore, through the structural design of the arc contact part and the movable matching design of the valve rod and the guide pipe, the valve clack can form double-guide lifting movement, so that the sealing performance of the valve clack is well guaranteed, and the sealing reliability of the valve clack is greatly enhanced.

Description

Technical Field

[0001] The utility model relates to a hydraulic control valve in a pipeline valve, in particular to a double-guide hydraulic control valve. Background Art

[0002] A hydraulic control valve is a pipeline valve controlled by water pressure, and its structure is usually composed of a valve body, a valve cover, a valve disc, a diaphragm, and an elastic element. However, the valve disc of a traditional hydraulic control valve has no guide structure for lifting and lowering, so it is easily affected by the medium, pressure, and elastic force of the elastic element in actual use, resulting in a deviation in the sealing position between the valve disc and the water hole, which greatly affects the sealing performance of the valve disc. Utility Model Content

[0003] The technical problem to be solved by the utility model is to overcome the defects of the prior art and provide a double-guide hydraulic control valve with reliable sealing.

[0004] The technical problem of the utility model is achieved through the following technical solutions:

[0005] A double-guide hydraulic control valve comprises a valve body, an inlet end and an outlet end respectively arranged at both ends of the valve body, a water hole arranged between the inlet end and the outlet end, a valve cover installed on the top of the valve body, a diaphragm arranged between the valve cover and the valve body, and a control chamber in the valve cover which is separated by the diaphragm alone, the diaphragm is provided with a valve disc, the control chamber is provided with an elastic element which elastically pushes the valve disc to seal and close the water hole, the inner surface of the valve cover is provided with a guide tube, the valve disc is provided with a vertically installed valve stem, the upper end of the valve stem movably extends into the guide tube, and the valve disc is guided to form a lifting and lowering guide movement through the telescopic movement of the valve stem in the guide tube.

[0006] An arc contact portion is formed between the outer circumference of the diaphragm and the top of the valve body, and the valve flap is guided to move upward and downward through the arc contact portion.

[0007] The valve flap is embedded in the middle of the diaphragm and is a round cover with an upper opening and a "∪"-shaped cross section.

[0008] The inner surface of the valve cover is provided with an upper spring seat extending downward, and the middle part of the valve disc is provided with a lower spring seat protruding upward together with the push diaphragm. The upper and lower spring seats are on the same axial line, and the two ends of the elastic element are respectively mounted on the upper and lower spring seats to form elastic push.

[0009] The lower end of the valve stem is installed on the lower spring seat, and the valve stem and the lower spring seat are on the same axial line.

[0010] An axially penetrating top hole is arranged in the upper spring seat, and the upper end of the guide tube is installed in the top hole, and the guide tube and the top hole are located on the same axial center line.

[0011] The valve cover is provided with an inlet hole.

[0012] Compared with the prior art, the utility model mainly adds a guide tube on the inner surface of the valve cover, and a vertically installed valve stem is arranged on the valve disc, and the upper end of the valve stem is movably extended into the guide tube; in this way, the valve disc can be guided to form a lifting and lowering guided movement through the telescopic movement of the valve stem in the guide tube; at the same time, an arc contact portion is formed between the outer circumference of the diaphragm and the top of the valve body, and the valve disc can also be guided to form a lifting and lowering guided movement through the arc contact portion; in this way, through the structural design of the arc contact portion, and the movable coordination design of the valve stem and the guide tube, the valve disc can form a double-guided lifting and lowering movement, thereby better ensuring the sealing performance of the valve disc and greatly enhancing the sealing reliability of the valve disc. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a cross-sectional structural schematic diagram of the utility model.

[0014] Figure 2 A cross-sectional view of the valve cover.

[0015] Figure 3 A cross-sectional view of the diaphragm and embedded disc. DETAILED DESCRIPTION

[0016] The embodiments of the present invention will be described in detail below according to the above-mentioned drawings.

[0017] like Figure 1~Figure 3 As shown, 1. valve body, 11. inlet end, 12. outlet end, 13. water hole, 2. valve cover, 21. control chamber, 22. top hole, 23. inlet hole, 24. upper spring seat, 3. diaphragm, 4. valve disc, 41. lower spring seat, 5. elastic element, 6. guide tube, 7. valve stem, 8. arc contact part, 9. bolt.

[0018] A double-guide hydraulic control valve, such as Figure 1 As shown, it is a pipeline valve for water pressure control, and its structure is mainly composed of a valve body 1, a valve cover 2, a diaphragm 3, a valve disc 4 and an elastic element 5.

[0019] The valve body 1 is provided with an inlet end 11 and an outlet end 12 at both ends, and a water hole 13 is provided between the inlet and outlet ends; the valve cover 2 is installed on the top of the valve body 1 through a plurality of bolts 9, and the diaphragm 3 is arranged between the valve cover 2 and the valve body 1, which not only plays a sealing role, but also can separate the control chamber 21 in the valve cover 2 through the diaphragm 3.

[0020] The inner surface of the valve cover 2 is as follows Figure 2As shown, an upper spring seat 24 extending downward is provided along the axis of the inner surface of the valve cover, an axially penetrating top hole 22 is provided in the upper spring seat, and a guide tube 6 is provided in the top hole, that is, the guide tube is located in the control cavity 21, and its upper end is detachably installed in the top hole 22 by screwing, and the guide tube 6 and the top hole 22 are exactly on the same axis; a plurality of inlet holes 23 are provided on the top of the valve cover 2, which can be used to assist the valve to open when liquid or air is introduced into the control cavity 21.

[0021] The diaphragm 3 is provided with a valve flap 4, the structure of which is as follows: Figure 3 As shown, the valve flap is mainly formed by embedding the valve flap in the middle of the diaphragm to form an integrated component. The valve flap 4 is an upper opening circular cover component with a "∪"-shaped cross section; at the same time, an arc contact portion 8 is formed between the outer circumference of the diaphragm 3 and the top of the valve body 1. In fact, a circle of convex structures with an arc-shaped cross section are provided on the inner circumference of the top of the valve body. When the outer circumference of the diaphragm 3 fits tightly against the convex structure, the arc contact portion 8 is formed, and the valve flap 4 is guided to form a lifting and lowering guide movement through the arc contact portion. The specific working method is as follows: when the valve flap 4 rises When the valve flap 4 is lifted, the arc contact portion 8 on the outer circumference of the diaphragm 3 will be driven to separate from the top of the valve body 1; when the valve flap 4 descends, the arc contact portion 8 on the outer circumference of the diaphragm 3 will be driven to fit tightly against the top of the valve body 1. Therefore, during the lifting and lowering process of the valve flap 4, the arc contact portion 8 on the outer circumference of the diaphragm 3 is in contact with or separated from the top of the valve body 1, thereby forming a primary guide for the lifting and lowering movement of the valve flap 4; of course, the outer circumference of the diaphragm 3 and the top of the valve body 1 may also be connected by a bevel contact portion or other contact portions of similar shapes, which can also achieve the purpose of use.

[0022] The middle part of the valve flap 4 is as follows Figure 3 As shown, a lower spring seat 41 is provided on the "∪"-shaped inner bottom surface of the valve disc 4, which pushes the diaphragm 3 upward along the axis, and a valve stem 7 is provided on the lower spring seat, that is, the lower end of the valve stem is detachably threaded and screwed on the lower spring seat 41, and is on the same axis as the lower spring seat, and the upper end of the valve stem 7 is movably extended into the guide tube 6; at this time, the upper and lower spring seats are just on the same axis, and the valve stem 7 and the guide tube 6 are also on the same axis, so the valve disc 4 can be guided to form a lifting guide movement through the telescopic movement of the valve stem 7 in the guide tube 6, that is, a secondary guide for the lifting movement of the valve disc 4 is formed.

[0023] An elastic element 5 is provided in the control chamber 21. In this embodiment, a cylindrical spring is selected as the elastic element. Both ends of the elastic element 5 are respectively mounted on the upper and lower spring seats to form an elastic push. Therefore, under normal conditions, the elastic push of the elastic element 5 enables the valve flap 4 to seal and close the water hole 13.

[0024] In addition, when the valve disc 4 moves upward to open the water hole 13, the lower spring seat 41 will also rise until it contacts the lower end of the guide tube 6 to form a contact limit, which is actually the limit of the valve opening position.

[0025] Obviously, the utility model can enable the valve flap 4 to form a double-guided lifting movement through the structural design of the arc contact part 8 and the movable cooperation design of the valve stem 7 and the guide tube 6, thereby better ensuring the sealing performance of the valve flap 4 and greatly enhancing the sealing reliability of the valve flap 4.

[0026] The above description is only a specific embodiment of the present invention. Those skilled in the art should understand that any structural design equivalent to this embodiment should be included in the protection scope of the present invention.

Claims

1. A dual-guide hydraulic control valve, comprising a valve body (1), an inlet end (11) and an outlet end (12) respectively arranged at both ends of the valve body (1), a water through hole (13) arranged between the inlet end and the outlet end, a valve cover (2) mounted on the top of the valve body (1), a diaphragm (3) arranged between the valve cover and the valve body, and a control chamber (21) in the valve cover (2) which is separated by the diaphragm, wherein a valve flap (4) is arranged on the diaphragm (3), and an elastic element (5) is arranged in the control chamber (21) for elastically pushing the valve flap (4) to seal and close the water through hole (13), characterized in that The inner surface of the valve cover (2) is provided with a guide tube (6), and the valve disc (4) is provided with a vertically mounted valve stem (7), the upper end of the valve stem movably extends into the guide tube (6), and the valve disc (4) is guided to form a lifting and lowering guided movement through the telescopic movement of the valve stem (7) in the guide tube (6).

2. A dual-guide hydraulic control valve according to claim 1, characterized in that An arc contact portion (8) is formed between the outer circumference of the diaphragm (3) and the top of the valve body (1), and the valve flap (4) is guided by the arc contact portion to form a lifting and lowering guided movement.

3. A dual-guide hydraulic control valve according to claim 1, characterized in that The valve flap (4) is embedded in the middle of the diaphragm (3), and the valve flap (4) is a round cover with an upper opening and a "∪"-shaped cross section.

4. A dual-guide hydraulic control valve according to claim 1, characterized in that The inner surface of the valve cover (2) is provided with an upper spring seat (24) extending downward, and the middle of the valve disc (4) is provided with a lower spring seat (41) protruding upward together with the push diaphragm (3). The upper and lower spring seats are located on the same axis, and the two ends of the elastic element (5) are respectively mounted on the upper and lower spring seats to form an elastic push.

5. A dual-guide hydraulic control valve according to claim 4, characterized in that The lower end of the valve stem (7) is mounted on the lower spring seat (41), and the valve stem (7) and the lower spring seat (41) are located on the same axial line.

6. A dual-guide hydraulic control valve according to claim 4, characterized in that The upper spring seat (24) is provided with an axially penetrating top hole (22), the upper end of the guide tube (6) is mounted in the top hole (22), and the guide tube (6) and the top hole (22) are located on the same axial line.

7. A dual-guide hydraulic control valve according to claim 1, characterized in that The valve cover (2) is provided with an inlet hole (23).

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