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 part, 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 part, and reliable sealing can be formed.

Description

Technical Field

[0001] The invention relates to a novel electric sewage discharge valve. Background Art

[0002] Chinese patent CN202410742297.2 discloses a structure of an electric sewage valve, including a valve housing assembly, a diaphragm assembly and a drive assembly, the valve housing assembly includes a lower valve body and an upper valve body, the upper valve body is mounted on the lower valve body, wherein a valve port is formed on the lower valve body; the diaphragm assembly includes a diaphragm, a connecting rod and an elastic member, the connecting rod is slidably connected to the upper valve body and connected to the diaphragm, and the diaphragm can control the on / off of the valve port under the drive of the connecting rod, the elastic member is mounted on the connecting rod and abuts against the connecting rod and the upper valve body respectively; the drive assembly includes a motor, a fixed pulley and a connecting rope, the motor is mounted in the upper valve body and is transmission-connected to the fixed pulley, the connecting rope is wound around the fixed pulley and is transmission-connected to the fixed pulley and the connecting rod respectively. The structure of this patent has the following problems: 1. Its sealing in the closed state mainly depends on the spring pressure. The spring force is linked to the traction force of the motor. When the spring force is large, the traction force of the motor decreases. Therefore, the spring force must be designed to be smaller than the motor force. Therefore, the sealing effect is limited by the motor force. Under limited cost, the sealing effect cannot achieve a good effect; 2. The diaphragm is in direct point contact with the valve body. In case of hair, cotton wool and other materials, the sealing cannot be guaranteed; 3. The structure is complex, with many components and poor assembly. Summary of the invention

[0003] The purpose of the present invention is to overcome the shortcomings and deficiencies of the prior art and to provide a new type of electric drain valve.

[0004] The technical solution adopted by the present invention is as follows: a new type of electric sewage valve, including a housing component, a valve core component, and a drive component.

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

[0006] The valve core assembly is arranged in the valve cavity and is limitedly matched with the housing assembly so that it can only slide axially relative to the housing assembly, and includes a lower shaft and a sealing plug fixed at one end of the lower shaft. The sealing plug cooperates with the valve port to control the opening / closing of the valve port;

[0007] The driving assembly includes a driving member and an upper shaft. The upper shaft passes through the shell assembly and extends into the valve cavity to cooperate with the lower shaft thread transmission. A limiting structure is provided so that the upper shaft can only rotate relative to the shell assembly. The driving member can drive the upper shaft to rotate forward and reverse.

[0008] The upper shaft is provided with a stud; the other end of the lower shaft opposite to the sealing plug is formed with a threaded blind hole for the stud to extend into to form a threaded transmission matching relationship.

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

[0010] The outer wall of the shell component is provided with a fourth convex ring whose upper end surface is a convex curved surface, and the lower end surface of the limiting rotating disk forms a point fit with the fourth convex ring.

[0011] A cam is arranged at the outer end of the limit turntable, and a control switch arranged corresponding to the cam is fixed outside the housing assembly.

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

[0013] The valve body includes a first valve body part adapted to the shape of the lower shaft and a second valve body part adapted to the shape of the outer cavity of the upper cover, the lower end of the first valve body part forms a valve port, the first valve body part and the second valve body part are transitioned by a step, the inner cavity of the upper cover is adapted to the shape of the lower shaft, and the O-ring is arranged between the step and the lower end of the upper cover, and its inner periphery is sealed with the outer periphery of the lower shaft.

[0014] The valve port includes 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 a bevel 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, a third convex ring is integrally formed on the cylindrical surface, and the cylindrical surface forms a point seal with the inner wall of the shell assembly.

[0016] A second convex ring is integrally formed on the cylindrical surface. The second convex ring is arranged between the third convex ring and the second conical sealing surface and is spaced a certain distance from the third convex ring. 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 present invention are as follows: the present invention can drive the upper shaft to rotate forward and reverse through the driving member, and drive the valve core assembly to move up and down through the threaded transmission matching structure. The upward traction force and downward compression force of the valve core assembly are determined by the torsional force of the driving member, and a reliable seal can be formed. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, without paying creative labor, other drawings obtained based on these drawings still belong to the scope of the present invention.

[0019] Figure 1 An exploded view of an embodiment of the present invention;

[0020] Figure 2 A cross-sectional view of an embodiment of the present invention;

[0021] Figure 3 This is a schematic diagram of the structure of an upper cover in an embodiment of the present invention;

[0022] Figure 4 This is a schematic diagram of the upper shaft structure in one embodiment of the present invention;

[0023] Figure 5 for Figure 2 The enlarged schematic diagram of part A in the middle;

[0024] Figure 6 A cross-sectional view of a valve body in one embodiment of the present invention;

[0025] Figure 7 for Figure 6 The enlarged schematic diagram of part A in the middle;

[0026] Figure 8 A schematic diagram of the structure of a sealing plug in an embodiment of the present invention;

[0027] Fig. 9 for Figure 2 The enlarged schematic diagram of part B in the middle;

[0028] Fig.10 This is a schematic diagram of the structure of the cooperation between the lower shaft and the upper cover in one embodiment of the present invention;

[0029] In the figure, motor 1, control switch 2, upper shaft 3, stud 301, limit turntable 302, cam 303, upper cover 4, through hole 401, limit groove 402, fourth convex ring 403, O-ring 5, lower shaft 6, threaded blind hole 601, sealing plug 7, second conical sealing surface 701, cylinder 702, second convex ring 703, third convex 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 convex ring 806. DETAILED DESCRIPTION

[0030] In order to make the objectives, technical solutions and advantages of the present invention more clear, the present invention will be further described in detail below with reference to the accompanying drawings.

[0031] It should be noted that all expressions using "first" and "second" in the embodiments of the present invention are for distinguishing two non-identical entities with the same name or non-identical parameters. It can be seen that "first" and "second" are only for the convenience of expression and should not be understood as limitations on the embodiments of the present invention. The subsequent embodiments will not explain this one by one.

[0032] The directions and positions mentioned in the present invention, such as up, down, front, back, left, right, inside, outside, top, bottom, side, etc., are only directions or positions with reference to the drawings. Therefore, the directions and positions used are used to explain and understand the present invention, but are not intended to limit the scope of protection of the present invention.

[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 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, and the two are connected by bolts to form a valve cavity. The O-ring 5 is arranged between the upper cover 4 and the valve body 8 to form a reliable seal at the connection between the two. The valve body 8 is provided with an inlet, an outlet, and a valve port 801 connecting the inlet and the outlet is formed in 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 arranged in the valve cavity between the upper cover 4 and the valve body 8 along the axial direction, and the sealing plug 7 cooperates with the valve port 801 to control the on / off of the valve port 801; the motor 1 and the upper shaft 3 are fixedly connected to form a driving assembly, and 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 matched 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 reverse, thereby driving the lower shaft 6 to move up and down in the valve body 8. The lower shaft 6 is limitedly matched with the housing assembly so that it can only slide axially but not rotate relative to the housing assembly. Specifically, Fig.10 As shown, the lower shaft 6 and the upper cover 4 are limitedly matched.

[0035] Specifically, Figure 3 As shown, the upper shaft 3 has a stud 301, a limit disc 302 and a cam 303. The upper end of the lower shaft 6 is formed with a threaded blind hole 601 for the stud 301 to extend into to form a threaded transmission fit. The limit disc 302 is connected to one end of the stud 301 and has an outer diameter greater than that of the stud 301. The cam 303 is disposed at the outer end of the limit disc 302. Figure 4As shown, the upper cover 4 is provided with a through hole 401 adapted to the stud 301 for the stud 301 to pass through, and a limiting groove 402 adapted to the limiting turntable 302 is provided outside the through hole 401, and a fourth convex ring 403 with a convex upper end surface is provided at the bottom of the limiting groove 402, as shown in FIG. Figure 5 As shown, the lower end surface of the limit rotating disk 302 forms a point fit with the fourth convex ring 403, which reduces the contact surface and thus reduces the 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 part 802 that is adapted to the shape of the lower shaft 6 and a second valve body part 803 that is adapted to the shape of the outer cavity of the upper cover 4. The lower end of the first valve body part 802 forms a valve port 801. The first valve body part 802 and the second valve body part 803 are transitioned by a step 804. The inner cavity of the upper cover 4 is adapted to the shape of the lower shaft 6. The O-ring 5 is arranged between the step 804 and the lower end of the upper cover 4 and its inner periphery is sealed with the outer periphery of the lower shaft 6 to prevent the medium from entering the area where the upper shaft 3 and the lower shaft 6 are matched and leaking out through the area connected between the upper shaft 3 and the upper cover 4.

[0038] Further, 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. Figure 8 As shown, the outer periphery of the sealing plug 7 has a second conical sealing surface 701 and a cylindrical surface 702, and the cylindrical surface 702 is integrally formed with a second convex ring 703 and a third convex ring 704, and the second convex ring 703 and the third convex ring 704 are arranged at a certain distance, such as Fig. 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 to strengthen the bevel seal, so that the valve port 801 and the sealing plug 7 have both surface seal and point seal to enhance the sealing performance. Furthermore, the cylindrical surface 702 cooperates with the inner circumference of the first valve body part 802, the radial thickness of the second convex ring 703 is less than the radial thickness of the third convex ring 704 and is arranged close to the second conical sealing surface 701 relative to the third convex ring 704, and the third convex ring 704 forms a point seal with the inner circumferential wall of the first valve body part 802 to form a safety measure after the bevel seal fails. The second convex ring 703 fits the inner circumferential wall of the first valve body part 802 to clean the inner circumferential wall of the first valve body part 802, ensuring that the sealing performance of the point seal formed by the third convex ring 704 will not be affected by foreign matter.

[0039] The above disclosure is only the preferred embodiment of the present invention, which certainly cannot be used to limit the scope of the present invention. Therefore, equivalent changes made according to the claims of the present invention are still within the scope of the present invention.

Claims

1. A new type of electric sewage valve, including 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 cavity connecting the inlet and the outlet, and the valve cavity is provided with a valve port (801); The valve core assembly is arranged in the valve cavity and is limitedly matched with the housing assembly so that it can only slide axially relative to the housing assembly, and comprises 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 on / off state of the valve port (801); The driving assembly comprises a driving member and an upper shaft (3); the upper shaft (3) passes through the housing assembly and extends into the valve cavity to be threadedly coupled 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 driving member can drive the upper shaft (3) to rotate forward and reverse.

2. The new electric drain valve according to claim 1 is characterized in that: The upper shaft (3) has a stud (301); the other end of the lower shaft (6) opposite to the sealing plug (7) is formed with a threaded blind hole (601) for the stud (301) to extend into to form a threaded transmission matching relationship.

3. The new electric drain valve according to claim 2 is characterized in that: The upper shaft (3) has a limiting turntable (302), which is arranged at one end of the stud (301), and the housing assembly is provided with a through hole (401) for the stud (301) to pass through. The limiting turntable (302) is connected to one end of the stud (301) and has an outer diameter greater than an inner diameter of the through hole (401). The limiting turntable (302) is rotatably arranged outside the housing assembly.

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

5. The new electric drain valve according to claim 3 is characterized in that: A cam (303) is provided at the outer end of the limit rotating disk (302), and a control switch (2) arranged corresponding to the cam (303) is fixed outside the housing assembly.

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

7. The new electric drain valve according to claim 6 is characterized in that: The valve body (8) comprises 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); a step (804) transitions between the first valve body portion (802) and the second valve body portion (803); the inner cavity of the upper cover (4) is adapted to the shape of the lower shaft (6); an O-ring (5) is arranged between the step (804) and the lower end of the upper cover (4) and its inner periphery is sealed with the outer periphery of the lower shaft (6).

8. The new electric drain valve according to claim 1 is characterized in that: The valve port (801) comprises a first conical sealing surface (805) and a first convex ring (806) integrally formed on the first conical sealing surface (805); the outer periphery of the sealing plug (7) comprises a second conical sealing surface (701); the first conical sealing surface (805) and the second conical sealing surface (701) form a bevel seal; the first convex ring (806) and the second conical sealing surface (701) form a point seal.

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

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

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