Novel electric blow-down valve

Abstract

The novel electric blow-down valve comprises a shell assembly, a valve element assembly and a driving assembly, an inlet, an outlet and a valve cavity communicated with the inlet and the outlet are formed in the shell assembly, and a valve port is formed in the valve cavity; the valve element assembly is arranged in the valve cavity and matched with the shell assembly in a limiting mode so that the valve element assembly can only axially slide relative to the shell assembly, the valve element assembly comprises a lower shaft and a sealing plug fixed to one end of the lower shaft, and the sealing plug is matched with the valve port to control opening / closing of the valve port. The driving assembly comprises a driving part and an upper shaft, the upper shaft penetrates through the shell assembly and extends into the valve cavity to be in threaded transmission fit with the lower shaft, a limiting structure is arranged to enable the upper shaft to only rotate relative to the shell assembly, and the driving part can drive the upper shaft to rotate forwards and backwards. The upper shaft can be driven to rotate forwards and backwards through the driving piece, the valve element assembly is driven to move up and down through the thread transmission matching structure, the upward traction force and the downward compression force of the valve element assembly are both determined by the twisting force of the driving piece, and reliable sealing can be formed.

Description

TECHNICAL FIELD

[0001] The utility model relates to a novel electric blowdown valve. BACKGROUND

[0002] Chinese patent CN202410742297.2 discloses a structure of electric blowdown valve, including valve shell assembly, diaphragm assembly and drive assembly, valve shell assembly includes lower valve body and upper valve body, upper valve body is installed on lower valve body, wherein, the valve port is formed on lower valve body;Diaphragm assembly includes diaphragm, connecting rod and elastic piece, connecting rod is slidably connected to upper valve body and is connected with diaphragm, and diaphragm can control the on / off of valve port under the driving of connecting rod, elastic piece is sleeved on connecting rod and respectively abuts with connecting rod and upper valve body;Drive assembly includes motor, fixed pulley and connecting rope, motor is installed in upper valve body and is transmission connected with fixed pulley, connecting rope is wound on fixed pulley and is transmission connected with fixed pulley and connecting rod respectively.The structure of the patent has the following problems: 1, its sealing property under the closed state mainly relies on spring pressure, spring force and motor traction force are hanged, when spring force is big, motor traction force drops, so spring force must be less than motor force when designing, therefore the effect of sealing property is limited by motor force, under the limited cost, the sealing property can not achieve good effect;2, diaphragm and valve body directly point contact, can not guarantee the sealing property when encountering hair, cotton flock and other substances;3, the structure is complex, and the components are numerous, and the assembly is poor. CONTENT OF UTILITY MODEL

[0003] The utility model aims at overcoming the shortcomings and deficiencies in the prior art and provides a novel electric blowdown valve.

[0004] The utility model adopts the technical scheme as follows: a novel electric blowdown valve, including shell assembly, valve core assembly, drive assembly,

[0005] The shell assembly is provided with an inlet, an outlet and a valve cavity communicating the inlet and the outlet, and a valve port is arranged in the valve cavity;

[0006] The valve core assembly is arranged in the valve cavity and is limitedly matched with the shell assembly to be axially slidable relative to the shell assembly, and includes a lower shaft and a sealing plug fixed to one end of the lower shaft, and the sealing plug is matched with the valve port to control the on / off of the valve port;

[0007] The drive assembly includes a driving member and an upper shaft, the upper shaft is screwed with the lower shaft to be transmission matched, and a limiting structure is arranged to make the upper shaft rotatable relative to the shell assembly, and the driving member can drive the upper shaft to reverse.

[0008] The upper shaft has a threaded stud, and the lower shaft has a threaded blind hole formed at the other end of the sealing plug, and the threaded stud is inserted into the threaded blind hole to form a threaded transmission matching relationship.

[0009] The upper shaft has a limiting turntable arranged at one end of the stud, the shell assembly is provided with a through hole for the stud to pass through, the limiting turntable is connected to one end of the stud and has an outer diameter larger than an inner diameter of the through hole, and the limiting turntable is rotatably arranged outside the shell assembly.

[0010] The outer wall of the shell assembly is provided with a fourth convex ring with a convex surface at the upper end, and the lower end surface of the limiting turntable forms point cooperation with the fourth convex ring.

[0011] The outer end of the limiting turntable is provided with a cam, and the shell assembly is fixedly provided with a control switch corresponding to the cam.

[0012] The shell assembly comprises an upper cover and a valve body, the upper cover and the valve body are connected to form a valve cavity, the valve body is provided with an inlet, an outlet and a valve port formed in the valve body and communicating with the inlet and the outlet, and an O-shaped sealing ring is arranged between the upper cover and the valve body.

[0013] The valve body comprises a first valve body part matched with the shape of the lower shaft and a second valve body part matched with the shape of the outer cavity of the upper cover, the lower end of the first valve body part forms the valve port, and the first valve body part and the second valve body part are connected through a step, the inner cavity of the upper cover is matched with the shape of the lower shaft, and the O-shaped sealing ring is arranged between the step and the lower end of the upper cover and is in sealing cooperation with the outer periphery of the lower shaft.

[0014] The valve port comprises a first conical sealing surface and a first convex ring integrally formed on the first conical sealing surface, the outer periphery of the sealing plug has a second conical sealing surface, the first conical sealing surface and the second conical sealing surface form an inclined surface seal, and the first convex ring and the second conical sealing surface form a point seal.

[0015] The outer periphery of the sealing plug has a cylindrical surface, the cylindrical surface is integrally formed with a third convex ring, and the cylindrical surface forms a point seal with the inner wall of the shell assembly.

[0016] The cylindrical surface is integrally formed with a second convex ring, the second convex ring is arranged between the third convex ring and the second conical sealing surface and is spaced apart from the third convex ring by a certain distance, and the radial thickness of the second convex ring is smaller than the radial thickness of the third convex ring.

[0017] The beneficial effects of the utility model are as follows: the utility model can drive the upper shaft to rotate forward and backward through the driving part, drive the valve core assembly to move up and down through the threaded transmission cooperation structure, and determine the upward traction and downward compression of the valve core assembly by the torsional force of the driving part, so that reliable sealing can be formed. BRIEF DESCRIPTION OF DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present application or the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced as follows. Obviously, the drawings in the following description only constitute some embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to these drawings without creative labor.

[0019] Figure 1 The exploded view of an embodiment of the present application;

[0020] Figure 2 The sectional view of an embodiment of the present application;

[0021] Figure 3 The structural schematic view of the upper cover in an embodiment of the present application;

[0022] Figure 4 The structural schematic view of the upper shaft in an embodiment of the present application;

[0023] Figure 5 The structural schematic view of the valve body in an embodiment of the present application; Figure 1 The enlarged schematic view of part A in the above figure;

[0024] Figure 6 The sectional view of the valve body in an embodiment of the present application;

[0025] Figure 7 The structural schematic view of the sealing plug in an embodiment of the present application; Figure 6 The enlarged schematic view of part A in the above figure;

[0026] Figure 8 The structural schematic view of the sealing plug in an embodiment of the present application;

[0027] Figure 9 The structural schematic view of the sealing plug in an embodiment of the present application; Figure 1 The enlarged schematic view of part A in the above figure;

[0028] Figure 10 The structural schematic view of the lower shaft and the upper cover in an embodiment of the present application;

[0029] In the figure, motor-1, control switch-2, upper shaft-3, stud-301, limit rotary disc-302, cam-303, upper cover-4, through hole-401, limit groove-402, fourth protruding ring-403, O-shaped sealing ring-5, lower shaft-6, threaded blind hole-601, sealing plug-7, second conical sealing surface-701, cylindrical surface-702, second protruding ring-703, third protruding ring-704, valve body-8, valve port-801, first valve body part-802, second valve body part-803, step-804, first conical sealing surface-805, first protruding ring-806. DETAILED DESCRIPTION

[0030] To make the objectives, technical solutions and advantages of this utility model clearer, the utility model will be described in further detail below with reference to the accompanying drawings.

[0031] It should be noted that all uses of "first" and "second" in the embodiments of this utility model are for the purpose of distinguishing two entities or parameters with the same name but different names. It is clear that "first" and "second" are only for the convenience of expression and should not be construed as limiting the embodiments of this utility model. Subsequent embodiments will not explain this in detail.

[0032] The directional and positional terms used in this utility model, such as up, down, front, back, left, right, inside, outside, top, bottom, side, etc., are only for reference to the accompanying drawings. Therefore, the directional and positional terms used are for the purpose of explaining and understanding this utility model, and not for limiting the scope of protection of this utility model.

[0033] A new type of electric drain valve, such as Figure 1 As shown, it includes a motor 1, a control switch 2, an upper shaft 3, an upper cover 4, an O-ring seal 5, a lower shaft 6, a sealing plug 7, and a valve body 8.

[0034] like Figure 2 As shown, the upper cover 4 and the valve body 8 constitute a housing assembly, which are connected by bolts to form a valve cavity. The O-ring seal 5 is placed between the upper cover 4 and the valve body 8 to form a reliable seal at the connection point. The valve body 8 has an inlet and an outlet, and a valve port 801 connecting the inlet and the outlet is formed inside the valve body 8. The lower shaft 6 and the sealing plug 7 are fixedly connected to form a valve core assembly, which is slidably disposed in the valve cavity between the upper cover 4 and the valve body 8 in the axial direction. The sealing plug 7 cooperates with the valve port 801 to control the opening / closing of the valve port 801. The motor 1 and the upper shaft 3 are fixedly connected to form a drive assembly. The motor 1 is connected to the outer end of the upper cover 4 by bolts. The upper shaft 3 passes through the upper cover 4 and is axially limited between the upper cover 4 and the motor 1, so that it can only rotate relative to the upper cover 4. One end of the upper shaft 3 is threadedly engaged with the lower shaft 6 and the other end is connected to the motor 1. The motor 1 can drive the upper shaft 3 to rotate forward and backward, thereby driving the lower shaft 6 to move up and down inside the valve body 8. The lower shaft 6 is limited by a locking fit with the housing assembly, allowing it to slide axially but not rotate relative to the housing assembly. Specifically, for example... Figure 10 As shown, the lower shaft 6 and the upper cover 4 are in a limiting fit.

[0035] Specifically, such as Figure 3 As shown, the upper shaft 3 has a stud 301, a limiting turntable 302, and a cam 303. The upper end of the lower shaft 6 has a threaded blind hole 601 for the stud 301 to extend into, forming a threaded transmission engagement. The limiting turntable 302 is connected to one end of the stud 301 and has an outer diameter larger than that of the stud 301. The cam 303 is located at the outer end of the limiting turntable 302.Figure 4 As shown, the upper cover 4 is provided with a through hole 401 for the stud 301 to pass through, and a limiting groove 402 adapted to the limiting turntable 302 outside the through hole 401. The bottom of the limiting groove 402 is provided with a fourth convex ring 403 with a convex curved upper surface, as shown. Figure 5 As shown, the lower end face of the limiting turntable 302 forms a point fit with the fourth convex ring 403, reducing the contact surface and thus reducing rotational friction.

[0036] The control switch 2 is fixed to the outer end of the upper cover 4 and cooperates with the cam 303. The control switch 2 can be a micro switch or a photoelectric switch.

[0037] like Figure 6 As shown, the valve body 8 includes a first valve body portion 802 adapted to the shape of the lower shaft 6 and a second valve body portion 803 adapted to the shape of the outer cavity of the upper cover 4. The lower end of the first valve body portion 802 forms a valve port 801. The first valve body portion 802 and the second valve body portion 803 are connected by a step 804. The inner cavity of the upper cover 4 is adapted to the shape of the lower shaft 6. An O-ring seal 5 is disposed between the step 804 and the lower end of the upper cover 4, and its inner circumference is sealed with the outer circumference of the lower shaft 6 to prevent the medium from entering the area where the upper shaft 3 and the lower shaft 6 meet and from leaking outward through the area connected between the upper shaft 3 and the upper cover 4.

[0038] Furthermore, such as Figure 7 As shown, the valve port 801 includes a first conical sealing surface 805 and a first convex ring 806 integrally formed on the first conical sealing surface 805, as... Figure 8 As shown, the sealing plug 7 has a second conical sealing surface 701 and a cylindrical surface 702 on its outer periphery. A second convex ring 703 and a third convex ring 704 are integrally formed on the cylindrical surface 702. The second convex ring 703 and the third convex ring 704 are spaced apart by a certain distance. Figure 9 As shown, the first conical sealing surface 805 and the second conical sealing surface 701 form a bevel seal, and the first convex ring 806 and the second conical sealing surface 701 form a point seal that strengthens the bevel seal, so that the valve port 801 and the sealing plug 7 have both surface seal and point seal, enhancing the sealing performance. Furthermore, the cylindrical surface 702 fits with the inner circumference of the first valve body portion 802. The radial thickness of the second convex ring 703 is less than the radial thickness of the third convex ring 704 and is positioned closer to the second conical sealing surface 701 than the third convex ring 704. The third convex ring 704 forms a point seal with the inner circumferential wall of the first valve body portion 802, which serves as a safety measure in case the bevel seal fails. The second convex ring 703, when in contact with the inner circumferential wall of the first valve body portion 802, cleans the inner circumferential wall of the first valve body portion 802, ensuring that foreign matter does not affect the sealing performance of the point seal formed by the third convex ring 704.

[0039] The above disclosed is only the preferred embodiment of the present application, of course, cannot be limited by this to limit the scope of the present application, therefore, the equivalent changes made according to the present application claims, still belong to the scope covered by the present application.

Claims

1. A novel electric drain valve, comprising a housing assembly, a valve core assembly, and a drive assembly, characterized in that: The housing assembly is provided with an inlet, an outlet, and a valve chamber connecting the inlet and the outlet, and a valve port (801) is provided in the valve chamber; The valve core assembly is disposed in the valve cavity and is limited to the housing assembly so that it can only slide axially relative to the housing assembly. It includes a lower shaft (6) and a sealing plug (7) fixed at one end of the lower shaft (6). The sealing plug (7) cooperates with the valve port (801) to control the opening / closing of the valve port (801). The drive assembly includes a drive member and an upper shaft (3). The upper shaft (3) extends through the housing assembly into the valve cavity and is threadedly engaged with the lower shaft (6). A limiting structure is provided so that the upper shaft (3) can only rotate relative to the housing assembly. The drive member can drive the upper shaft (3) to rotate in both directions.

2. The novel electric drain valve according to claim 1, characterized in that: The upper shaft (3) has a stud (301); the lower shaft (6) has a threaded blind hole (601) at the other end relative to the sealing plug (7), into which the stud (301) extends to form a threaded transmission engagement relationship.

3. The novel electric drain valve according to claim 2, characterized in that: The upper shaft (3) has a limiting turntable (302), which is disposed at one end of the stud (301). The housing assembly has a through hole (401) through which the stud (301) passes. The limiting turntable (302) is connected to one end of the stud (301) and its outer diameter is larger than the inner diameter of the through hole (401). The limiting turntable (302) is rotatably disposed outside the housing assembly.

4. The novel electric drain valve according to claim 3, characterized in that: The outer wall of the housing assembly is provided with a fourth convex ring (403) with a convex curved upper surface, and the lower end surface of the limiting turntable (302) forms a point fit with the fourth convex ring (403).

5. The novel electric drain valve according to claim 3, characterized in that: The outer end of the limiting turntable (302) is provided with a cam (303), and a control switch (2) corresponding to the cam (303) is fixed on the outside of the housing assembly.

6. The novel electric drain valve according to claim 2, characterized in that: The housing assembly includes an upper cover (4) and a valve body (8). The upper cover (4) and the valve body (8) are connected to form a valve cavity. The valve body (8) is provided with an inlet and an outlet, and a valve port (801) connecting the inlet and the outlet is formed inside the valve body (8). An O-ring (5) is provided between the upper cover (4) and the valve body (8).

7. The novel electric drain valve according to claim 6, characterized in that: The valve body (8) includes a first valve body portion (802) adapted to the shape of the lower shaft (6) and a second valve body portion (803) adapted to the shape of the outer cavity of the upper cover (4). The lower end of the first valve body portion (802) forms a valve port (801). The first valve body portion (802) and the second valve body portion (803) are connected by a step (804). The inner cavity of the upper cover (4) is adapted to the shape of the lower shaft (6). An O-ring seal (5) is disposed between the step (804) and the lower end of the upper cover (4) and its inner circumference is sealed to the outer circumference of the lower shaft (6).

8. The novel electric drain valve according to claim 1, characterized in that: The valve port (801) includes a first conical sealing surface (805) and a first convex ring (806) integrally formed on the first conical sealing surface (805). The sealing plug (7) has a second conical sealing surface (701) on its outer periphery. The first conical sealing surface (805) and the second conical sealing surface (701) form a slope seal. The first convex ring (806) and the second conical sealing surface (701) form a point seal.

9. The novel electric drain valve according to claim 8, characterized in that: The sealing plug (7) has a cylindrical surface (702) on its outer periphery, and a third convex ring (704) is integrally formed on the cylindrical surface (702). The cylindrical surface (702) forms a point seal with the inner wall of the housing assembly.

10. The novel electric drain valve according to claim 9, characterized in that: A second protruding ring (703) is integrally formed on the cylindrical surface (702). The second protruding ring (703) is disposed between the third protruding ring (704) and the second conical sealing surface (701) and is spaced a certain distance from the third protruding ring (704). The radial thickness of the second protruding ring (703) is less than the radial thickness of the third protruding ring (704).

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