Magnetic locking gate valve

Abstract

The utility model discloses a magnetic locking gate valve, which comprises a valve body, a valve cover, a gate plate, a valve rod, a rotating sleeve and the like, and is mainly characterized in that a coaxial convex shaft is additionally arranged in the middle of the valve rod, the convex shaft is rotatably and hermetically mounted in a valve rod hole of the valve cover, and an inner shoulder is arranged at the lower end of the valve rod hole and is used for positioning the bottom of the convex shaft and limiting the downward movement of the valve rod. A riveting necking is formed in the upper end of the valve rod hole and is used for positioning the top of the convex shaft and limiting the upward movement of the valve rod; obviously, the upper positioning structure and the lower positioning structure which are matched with the convex shaft through the inner shoulder and the riveting throat not only are simpler in structure, but also effectively reduce assembly parts, simplify the assembly process, reduce the production cost and improve the assembly efficiency. Meanwhile, after the upper end of the valve rod extends out of the valve cover and is in transmission connection with the rotating sleeve, an opening clamp spring is further arranged to form disengagement prevention, so that punching from the outer side of the rotating sleeve to be matched with fixing of a positioning pin is not needed, wounds left on the rotating sleeve are avoided, the possibility that the valve is maliciously damaged from the outside is eradicated, and safety is improved.

Description

Technical Field

[0001] The utility model relates to a gate valve structure in a pipeline valve, in particular to a magnetic locking gate valve. Background Art

[0002] The magnetic locking gate valve is a commonly used pipeline valve, which is widely used in urban tap water and heating pipeline systems. It plays the role of cutting off the medium. It has a locking function, which can control the on and off of the heating and water supply systems one household at a time, and cannot be opened non-destructively, thereby achieving effective control. At present, the structure of the magnetic locking gate valve is mainly composed of a valve body, a valve cover, a gate, a valve stem and a rotating sleeve. The valve cover is sealed and installed on the top of the valve body. The upper end of the valve stem extends out of the valve cover and is connected to the rotating sleeve. The lower end of the valve stem passes through the valve stem hole in the valve cover and extends into the valve body to connect the gate; therefore, the valve stem is driven to rotate by the rotating sleeve, which can drive the gate to move up and down to open and close the valve. However, the assembly method of the valve cover and valve stem of the traditional magnetic locking gate valve is mainly to insert the valve stem through the upper end or the lower end of the valve cover, and then fix the valve stem and the valve cover with a nut or a clamping ring. This fixing structure often has defects such as many parts, high production cost, cumbersome assembly process, and low efficiency. In addition, the valve stem and the rotating sleeve of the traditional magnetic locking gate valve are usually axially fixedly connected by a locating pin. Therefore, during processing, holes must be punched on the outside of the rotating sleeve to cooperate with the fixation of the locating pin, leaving scars on the rotating sleeve. After the overall assembly of the valve is completed, the rotating sleeve is directly exposed to the outside, and others can maliciously damage the valve from the holes in the rotating sleeve, thereby causing the locking function of the valve to fail. 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 magnetic locking gate valve with simple structure, convenient assembly, low production cost and good safety.

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

[0005] A magnetic locking gate valve comprises a valve body, a valve cover, a gate plate, a valve stem and a rotating sleeve; the valve cover seal is installed on the top of the valve body; the valve stem rotating seal is installed in the valve stem hole of the valve cover, the upper end of the valve stem extends out of the valve cover to connect with the rotating sleeve, and the lower end of the valve stem extends into the valve body to connect with the gate plate, a coaxial cam is provided in the middle of the valve stem, and the cam is rotatably sealed and installed in the valve stem hole of the valve cover, an inner shoulder is provided at the lower end of the valve stem hole for positioning the bottom of the cam and limiting the downward movement of the valve stem, and a riveted neck is provided at the upper end of the valve stem hole for positioning the top of the cam and limiting the upward movement of the valve stem.

[0006] The riveted shrinkage is formed by the riveted boss protruding from the upper end of the valve stem hole being deformed inwardly by being subjected to force.

[0007] The inward tilting deformation angle α of the riveted boss is 45° to 60°.

[0008] The riveted boss is an annular boss coaxial with the valve stem hole, and the thickness of the riveted boss is 1.8 mm to 2 mm.

[0009] The upper end of the valve stem extends out of the valve cover to drive and connect the rotating sleeve, and an open clamping spring is arranged between the upper end of the valve stem and the rotating sleeve, and the rotating sleeve is prevented from falling off relative to the upper end of the valve stem through the open clamping spring.

[0010] The upper end of the valve stem is provided with a flat shaft, which is fitted in the flat hole of the rotating sleeve to form a transmission connection.

[0011] An axial positioning gap is reserved between the upper end surface of the flat shaft and the bottom of the flat hole.

[0012] The convex shaft is a cylindrical shaft coaxial with the valve stem, the outer diameter of the convex shaft is larger than the outer diameter of the valve stem, and a top outer shoulder is formed at the top of the convex shaft, and a bottom outer shoulder is formed at the bottom of the convex shaft; the inner shoulder at the lower end of the valve stem hole contacts the bottom outer shoulder at the bottom of the convex shaft to form a positioning, and the riveted shrinkage at the upper end of the valve stem hole presses the top outer shoulder at the top of the convex shaft to form a positioning.

[0013] An O-ring for forming a valve stem rotation seal is arranged between the outer circumferential surface of the convex shaft and the inner circumferential surface of the valve stem hole.

[0014] A locking spring and a locking magnetic block for forming magnetic locking are arranged between the valve cover and the rotating sleeve.

[0015] Compared with the prior art, the utility model mainly adds a coaxial cam shaft in the middle part of the valve stem, and the cam shaft is rotatably sealed and installed in the valve stem hole of the valve cover, and then an inner shoulder is provided at the lower end of the valve stem hole for positioning the bottom of the cam shaft and limiting the downward movement of the valve stem, and a riveted neck is provided at the upper end of the valve stem hole for positioning the top of the cam shaft and limiting the upward movement of the valve stem; obviously, this upper and lower positioning structure of the cam shaft coordinated with the inner shoulder and the riveted neck is not only simpler in structure than the fixing method of nuts or clamping rings used in traditional magnetic locking gate valves, but also effectively reduces assembly parts, simplifies the assembly process, reduces production costs and improves assembly efficiency. At the same time, after the upper end of the valve stem extends out of the valve cover and is connected to the rotating sleeve, an open retaining spring is provided between the two, that is, the rotating sleeve can be prevented from falling off relative to the upper end of the valve stem through the open retaining spring. In this way, there is no need to drill holes from the outside of the rotating sleeve to cooperate with the fixation of the locating pin, so that no trauma will be left on the rotating sleeve. Even if the valve is assembled as a whole and the rotating sleeve is directly exposed to the outside, the possibility of the valve being maliciously damaged from the outside can be eliminated, thereby greatly improving safety. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0017] Figure 2 This is a cross-sectional view of the valve cover (the riveted boss does not form a riveted neck).

[0018] Figure 3 This is a cross-sectional view of the valve cover (the riveted boss forms a riveted constriction).

[0019] Figure 4 Schematic diagram of the valve stem structure.

[0020] Figure 5 It is a structural schematic diagram of the rotating sleeve. DETAILED DESCRIPTION

[0021] The embodiments of the present invention will be described in detail below according to the above-mentioned drawings.

[0022] like Figure 1~Figure 5 As shown, 1. valve body, 2. valve cover, 21. valve stem hole, 22. inner shoulder, 23. riveted boss, 24. riveted shrinkage, 3. gate, 4. valve stem, 41. convex shaft, 42. flat shaft, 43. embedded groove, 44. annular groove, 45. top outer shoulder, 46. bottom outer shoulder, 5. rotating sleeve, 51. flat hole, 52. locking hole, 6. opening retaining ring, 7. locking magnet, 8. locking spring, 9. O-ring, 10. mouth surface gasket.

[0023] A magnetic locking gate valve, which relates to a pipeline valve used for medium on and off, has a structure as follows Figure 1 As shown, it includes a valve body 1, a valve cover 2, a gate plate 3, a valve stem 4 and a rotating sleeve 5, etc.

[0024] The valve cover 2 is installed on the top of the valve body 1 by screwing, and a mouth gasket 10 is provided at the connection between the valve cover 2 and the valve body 1 to form a sealed installation.

[0025] The valve cover 2 is provided with a valve stem hole 21 extending vertically along the axial line of the valve cover in the middle part, and a coaxial convex shaft 41 is provided in the middle part of the valve stem 4. The convex shaft is a cylindrical shaft coaxial with the valve stem, and the outer diameter of the convex shaft 41 is larger than the outer diameter of the valve stem 4, so a top outer shoulder 45 is formed at the top of the convex shaft 41, and a bottom outer shoulder 46 is formed at the bottom of the convex shaft 41.

[0026] Moreover, an annular groove 43 coaxial with the convex shaft is provided on the outer circumferential surface of the convex shaft 41. If a double groove is selected in the present embodiment, an O-ring 9 is fixedly installed in each groove 43. Then, the valve stem 4 can be rotatably sealed and installed in the valve stem hole 21 of the valve cover 2 through the convex shaft 41, and the double O-ring is in contact with the inner circumferential surface of the valve stem hole 21 at the same time, so it can become a dynamic seal of the valve stem 4, that is, the valve stem 4 is rotatably sealed by the double O-ring between the outer circumferential surface of the convex shaft 41 and the inner circumferential surface of the valve stem hole 21.

[0027] At the same time, an inner shoulder 22 is provided at the lower end of the valve stem hole 21, which can directly contact the bottom outer shoulder 46 at the bottom of the convex shaft 41 to form a positioning and limit the downward movement of the valve stem 4; a riveted shrinkage 24 is provided at the upper end of the valve stem hole 21, which can press the top outer shoulder 45 at the top of the convex shaft 41 to form a positioning and limit the upward movement of the valve stem 4, so that the convex shaft 41 of the valve stem 4 can be positioned in the valve stem hole 21 to prevent axial separation or movement.

[0028] Obviously, this upper and lower positioning structure of the convex shaft 41 coordinated by the inner shoulder 22 and the riveted neck 24 is not only simpler in structure than the fixing method using nuts or clamping rings in the traditional magnetic locking gate valve, but also effectively reduces assembly parts, simplifies the assembly process, reduces production costs and improves assembly efficiency.

[0029] The riveted necking 24 is made of Figure 2 , Figure 3 The riveted boss 23 protruding from the upper end of the valve stem hole 21 is deformed inwardly by force. The riveted boss 23 is an annular boss coaxial with the valve stem hole 21, and its thickness is 1.8mm~2mm. The riveted boss 23 is deformed inwardly by force at an angle α of 45°~60° to form a riveted neck 24 with a suitable structure.

[0030] When the valve stem 4 and the valve cover 2 are installed in place, the upper end of the valve stem 4 extends out of the valve cover 2 to be transmission-connected to the rotating sleeve 5. Specifically, a flat shaft 42 is provided at the upper end of the valve stem 4, and the flat shaft fits in the flat hole 51 of the rotating sleeve 5 to form a transmission connection. Therefore, the valve stem 4 can be driven to rotate through the rotating sleeve 5, and an axial positioning gap must be reserved between the upper end surface of the flat shaft 42 and the bottom of the flat hole 51.

[0031] In addition, annular grooves 44 are respectively provided between the upper end of the valve stem 4 and the rotating sleeve 5, and open retaining springs 6 are provided in the two opposite annular grooves, so that the rotating sleeve 5 can be prevented from falling off relative to the upper end of the valve stem 4 through the open retaining spring 6. In this way, there is no need to drill holes from the outside of the rotating sleeve 5 to cooperate with the fixation of the locating pin, so that no trauma will be left on the rotating sleeve 5. Even if the valve is assembled as a whole and the rotating sleeve is directly exposed to the outside, the possibility of the valve being maliciously damaged from the outside can be eliminated, thereby greatly improving the safety.

[0032] The lower end of the valve stem 4 extends into the valve body 1 to connect with the gate plate 3, so the valve stem 4 is driven to rotate by the rotating sleeve 5, which can drive the gate plate 3 to move up and down to open and close the valve.

[0033] A locking spring 8 and a locking magnetic block 7 for magnetic locking are arranged between the valve cover 2 and the rotating sleeve 5. The structure is as follows: Figure 1As shown, a locking magnet 7 which is elastically pushed upward by a locking pin spring 8 is mainly provided on the top surface of the valve cover 2, and a locking hole 52 is correspondingly provided on the bottom surface of the rotating sleeve 5; when the rotating sleeve 5 rotates relative to the valve cover 2 and drives the locking hole 52 to face the locking magnet 7, the locking magnet will be elastically pushed into the locking hole 52 and engaged between the valve cover 2 and the rotating sleeve 5, thereby forming a rotational locking of the rotating sleeve relative to the valve cover; when the locking magnet 7 is pushed by a repelling magnet in a special unlocking tool positioned on the top surface of the rotating sleeve 5 and moves downward to disengage from the locking hole 52, the rotational unlocking of the rotating sleeve 5 relative to the valve cover 2 can be formed.

[0034] 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 magnetic lock gate valve, comprising a valve body (1), a valve cover (2), a gate plate (3), a valve stem (4) and a rotating sleeve (5); the valve cover (2) is sealingly mounted on the top of the valve body (1); the valve stem (4) is rotatingly sealingly mounted in a valve stem hole (21) of the valve cover (2); the upper end of the valve stem (4) extends out of the valve cover (2) to connect to the rotating sleeve (5), and the lower end of the valve stem (4) extends into the valve body (1) to connect to the gate plate (3), characterized in that A coaxial convex shaft (41) is provided in the middle of the valve stem (4), and the convex shaft is rotatably sealed and installed in the valve stem hole (21) of the valve cover (2). An inner shoulder (22) is provided at the lower end of the valve stem hole for positioning the bottom of the convex shaft (41) and limiting the downward movement of the valve stem (4). A riveted constriction (24) is provided at the upper end of the valve stem hole (21) for positioning the top of the convex shaft (41) and limiting the upward movement of the valve stem (4).

2. A magnetic lock gate valve according to claim 1, characterized in that The riveted shrinkage (24) is formed by the riveted boss (23) protruding from the upper end of the valve stem hole (21) being deformed inwardly by being subjected to force.

3. A magnetic lock gate valve according to claim 2, characterized in that The inward tilting deformation angle α of the riveted boss (23) is 45° to 60°.

4. A magnetic lock gate valve according to claim 2, characterized in that The riveted boss (23) is an annular boss coaxial with the valve stem hole (21), and the thickness of the riveted boss (23) is 1.8 mm to 2 mm.

5. A magnetic lock gate valve according to claim 1, characterized in that The upper end of the valve stem (4) extends out of the valve cover (2) and is drivingly connected to the rotating sleeve (5), and an open retaining spring (6) is provided between the upper end of the valve stem (4) and the rotating sleeve (5), and the rotating sleeve (5) is prevented from falling off relative to the upper end of the valve stem (4) via the open retaining spring (6).

6. A magnetic lock gate valve according to claim 5, characterized in that The upper end of the valve stem (4) is provided with a flat shaft (42), which fits into the flat hole (51) of the rotating sleeve (5) to form a transmission connection.

7. A magnetic lock gate valve according to claim 6, characterized in that An axial positioning gap is reserved between the upper end surface of the flat shaft (42) and the bottom of the flat hole (51).

8. A magnetic lock gate valve according to claim 1, characterized in that The convex shaft (41) is a cylindrical shaft coaxial with the valve stem (4). The outer diameter of the convex shaft (41) is larger than the outer diameter of the valve stem (4), and a top outer shoulder (45) is formed at the top of the convex shaft (41), and a bottom outer shoulder (46) is formed at the bottom of the convex shaft (41). The inner shoulder (22) at the lower end of the valve stem hole (21) contacts the bottom outer shoulder (46) at the bottom of the convex shaft (41) to form a positioning, and the riveted shrinkage (24) at the upper end of the valve stem hole (21) presses the top outer shoulder (45) at the top of the convex shaft (41) to form a positioning.

9. A magnetic lock gate valve according to claim 1, characterized in that An O-ring (9) is provided between the outer circumferential surface of the convex shaft (41) and the inner circumferential surface of the valve stem hole (21) to form a rotation seal for the valve stem (4).

10. A magnetic lock gate valve according to claim 1, characterized in that A locking spring (8) and a locking magnetic block (7) for forming a magnetic lock are provided between the valve cover (2) and the rotating sleeve (5).

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