Sewage pump bottom valve filtering device

Abstract

The utility model relates to the technical field of bottom valves, in particular to a sewage pump bottom valve filtering device which comprises a valve body, and a bottom flange of the valve body is connected with a valve cover. The guide assembly is fixedly connected to the inner wall of the valve body through a supporting frame, a valve rod penetrates through the interior of the guide assembly, a pressing plate is integrally formed at the bottom of the valve rod, and the bottom of the pressing plate is connected with a valve clack through a bolt; and the valve seat is extruded between the valve body and the flange part of the valve cover, and a valve clack is inserted into the valve seat. Through the arrangement of the valve clack with the conical surface structure, the valve clack and the valve seat are mutually inserted and sealed, so that the sealing effect is improved, automatic adjustment and sealing can be realized after abrasion, meanwhile, the valve rod is in rolling contact with the ball, the smoothness of vertical displacement of the valve rod is further improved, the displacement friction force is greatly reduced, and the service life is prolonged. And therefore, the displacement smoothness of the valve clack is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of bottom valves, in particular to a bottom valve filtering device for a sewage pump. Background Art

[0002] The bottom valve is an energy-saving valve, which is usually installed at the bottom of the underwater suction pipe of the sewage pump. It restricts the liquid in the pump pipe from returning to the water source, and plays the role of only letting in but not letting out. At the same time, the filter mesh structure of the valve cover ensures the passage of water source while also playing a good filtering role, filtering out larger impurities to avoid clogging of subsequent sewage pumps.

[0003] However, when the existing bottom valve of the sewage pump is in use, the internal valve disc and the valve seat are sealed by a flat contact method. Due to the aging of the rubber pad at the bottom of the valve disc, the contact effect of the sealing contact surface is reduced in the later period of use, thereby reducing its sealing effect and easily guiding liquid backflow. At the same time, the sliding contact between the valve stem and the guide frame increases the friction of the valve stem, further affecting the smoothness of the valve disc's up and down adjustment displacement. Utility Model Content

[0004] The purpose of the utility model is to provide a bottom valve filter device for a sewage pump to solve the problems raised in the above-mentioned background technology, namely, the influence of aging of the rubber pad at the bottom of the valve disc, the reduction of the contact effect of the sealing contact surface in the later period of use, thereby reducing its sealing effect, easily diverting liquid backflow, and low smoothness of the valve stem displacement in the later period.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a bottom valve filter device for a sewage pump, comprising:

[0006] A valve body, wherein a bottom flange of the valve body is connected to a valve cover;

[0007] A guide assembly, wherein the guide assembly is fixedly connected to the inner wall of the valve body via a support frame, and a valve stem is passed through the interior of the guide assembly, a pressure plate is integrally formed at the bottom of the valve stem, and a valve disc is connected to the bottom of the pressure plate via bolts;

[0008] The valve seat is squeezed between the valve body and the valve cover flange, and a valve disc is inserted into the interior of the valve seat.

[0009] Preferably, flange rings are provided at the upper and lower ends of the valve body and the top of the valve cover, and the bottom of the valve cover is in a hemispherical ring filter structure.

[0010] Preferably, the outer wall of the valve seat is provided with a locking lug, and the flange rings of the valve body and the valve cover are both provided with a limiting groove adapted to the locking lug of the valve seat on one side close to each other.

[0011] Preferably, the outer diameter of the valve seat is equal to the outer diameter of the flange ring, the interior of the valve seat is in a conical structure, and the lower half of the valve disc is also in a conical structure.

[0012] Preferably, the diameter of the pressure plate is equal to the maximum diameter of the valve disc, and the diameter of the pressure plate is larger than the inner diameter of the valve seat, and a threaded hole for fitting a bolt is provided at the center of the pressure plate.

[0013] Preferably, the guide assembly includes an outer cylinder, the inner wall of the outer cylinder is connected to the inner cylinder, and a ball is rotatably arranged between the outer cylinder and the inner cylinder, and the outer wall of the ball is in contact with the outer wall of the valve stem.

[0014] Preferably, the diameter of the valve stem is smaller than the inner diameter of the inner cylinder, the center of the support frame is a cylindrical structure, and a threaded hole is provided on the top of the cylindrical structure. The maximum outer diameter of the outer cylinder is equal to the outer diameter of the cylindrical structure, and a positioning hole is provided on the outer cylinder corresponding to the threaded hole of the support frame.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows: the present invention adopts the arrangement of a conical surface structure valve disc, so that the valve disc and the valve seat are plugged and sealed with each other, thereby improving the sealing effect, and can realize automatic adjustment of the seal after wear. At the same time, the valve stem adopts rolling contact with the ball, which further improves the smoothness of the up and down displacement of the valve stem, greatly reduces its displacement friction, thereby improving the smoothness of the valve disc displacement, and making its opening and closing adjustment smoother, avoiding the valve disc from getting stuck and causing its function to fail. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic cross-sectional view of the utility model;

[0017] Figure 2 For the utility model Figure 2 Schematic diagram of the enlarged structure of A;

[0018] Figure 3 It is a schematic diagram of the overall structure of the utility model;

[0019] Figure 4 This is a schematic diagram of the valve disc explosion structure of the utility model;

[0020] Figure 5 This is a schematic diagram of the valve cover explosion structure of the utility model.

[0021] In the figure: 1. Valve body; 2. Valve cover; 3. Support frame; 4. Guide assembly; 41. Outer cylinder; 42. Inner cylinder; 43. Ball; 5. Valve stem; 51. Pressure plate; 6. Valve disc; 7. Valve seat; 8. Bolt. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0023] See also Figure 1-5 The present invention provides an embodiment of a sewage pump bottom valve filtering device, comprising:

[0024] Valve body 1, the bottom flange of the valve body 1 is connected to the valve cover 2; guide assembly 4, the guide assembly 4 is fixedly connected to the inner wall of the valve body 1 through the support frame 3, and the inside of the guide assembly 4 is penetrated by a valve stem 5, the bottom of the valve stem 5 is integrally formed with a pressure plate 51, and the bottom of the pressure plate 51 is connected to a valve disc 6 through a bolt 8; valve seat 7, the valve seat 7 is squeezed between the flange part of the valve body 1 and the valve cover 2, and the inside of the valve seat 7 is inserted with a valve disc 6, and the extrusion contact between the valve disc 6 and the conical surface of the valve seat 7 can improve the sealing of the contact between the two, thereby avoiding the occurrence of poor sealing due to wear and aging.

[0025] Furthermore, flange rings are provided at the upper and lower ends of the valve body 1 and the top of the valve cover 2, and the bottom of the valve cover 2 is a hemispherical ring filter structure, which plays a good filtering role.

[0026] Furthermore, the outer wall of the valve seat 7 is provided with a locking lug, and the flange rings of the valve body 1 and the valve cover 2 are close to each other on one side and are provided with a limiting groove adapted to the locking lug of the valve seat 7. By squeezing and positioning the valve seat 7, the stable installation of the valve seat 7 is completed.

[0027] Furthermore, the outer diameter of the valve seat 7 is equal to the outer diameter of the flange ring, the interior of the valve seat 7 has a conical structure, the lower half of the valve flap 6 also has a conical structure, and the height of the conical structure of the valve flap 6 is greater than the height of the valve seat 7. As a result, when the contact surface between the valve flap 6 and the valve seat 7 wears, the valve flap 6 moves downward to complete the sealing and extrusion contact with the valve seat 7, thereby greatly improving the service life of the sealing contact between the two.

[0028] Furthermore, the diameter of the pressure plate 51 is equal to the maximum diameter of the valve disc 6, and the diameter of the pressure plate 51 is larger than the inner diameter of the valve seat 7. A threaded hole for fitting the bolt 8 is provided in the center of the pressure plate 51. The valve disc 6 is penetrated by the bolt 8 and connected to the pressure plate 51 to complete the extrusion positioning installation of the valve disc 6.

[0029] Furthermore, the guide assembly 4 includes an outer cylinder 41, the inner wall of the outer cylinder 41 is connected to the inner cylinder 42, and a ball 43 is rotatably arranged between the outer cylinder 41 and the inner cylinder 42, the outer wall of the ball 43 is in contact with the outer wall of the valve stem 5, the diameter of the valve stem 5 is smaller than the inner diameter of the inner cylinder 42, the center of the support frame 3 is a cylindrical structure, and a threaded hole is provided on the top of the cylindrical structure, the maximum outer diameter of the outer cylinder 41 is equal to the outer diameter of the cylindrical structure, and a positioning hole is provided on the outer cylinder 41 corresponding to the threaded hole of the support frame 3, and the rolling contact of the ball 43 contacts the valve stem 5, which can greatly improve the smoothness of the up and down displacement of the valve stem 5, and the outer cylinder 41 and the inner cylinder 42 are tightly connected by countersunk screws. The outer cylinder 41 is divided into two halves, which are convenient for clamping and mounting with the inner cylinder 42, so that the subsequent disassembly and maintenance are convenient through the setting of its assembled structure.

[0030] Working principle: The valve body 1 and valve cover 2 used in this application are products that can be purchased directly on the market. Their principles and connection methods are existing technologies well known to those skilled in the art, so they will not be repeated here. When the utility model is in use, the device is first installed and positioned. Further, when the sewage pump is started, the water pressure acts on the valve flap 6 to open it, and water enters the valve body 1 from the valve cover 2 and is transported through the pump body. When the water pump stops working, the valve flap 6 is closed under the combined action of liquid pressure and its own weight to prevent water from flowing back to the water source.

[0031] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the present invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the present invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the present invention is defined by the appended claims, not the foregoing description, and all variations within the meaning and range of equivalents of the claims are intended to be encompassed within the present invention. Any reference sign in a claim should not be construed as limiting the claim to which it relates.

Claims

1. A sewage pump bottom valve filtering device, characterized in that: include: A valve body (1), wherein the bottom flange of the valve body (1) is connected to a valve cover (2); A guide assembly (4), wherein the guide assembly (4) is fixedly connected to the inner wall of the valve body (1) via a support frame (3), and a valve stem (5) is passed through the interior of the guide assembly (4), a pressure plate (51) is integrally formed at the bottom of the valve stem (5), and the bottom of the pressure plate (51) is connected to the valve disc (6) via a bolt (8); A valve seat (7) is squeezed between the valve body (1) and the flange portion of the valve cover (2), and a valve flap (6) is inserted into the interior of the valve seat (7).

2. A sewage pump bottom valve filter device according to claim 1, characterized in that: Flange rings are provided at the upper and lower ends of the valve body (1) and the top of the valve cover (2), and the bottom of the valve cover (2) is in the form of a hemispherical ring filter structure.

3. A sewage pump bottom valve filter device according to claim 2, characterized in that: The outer wall of the valve seat (7) is provided with a locking lug, and the flange rings of the valve body (1) and the valve cover (2) are both provided with a limit groove adapted to the locking lug of the valve seat (7) on one side close to each other.

4. A sewage pump bottom valve filter device according to claim 2, characterized in that: The outer diameter of the valve seat (7) is equal to the outer diameter of the flange ring, the interior of the valve seat (7) is in a conical structure, and the lower half of the valve flap (6) is also in a conical structure.

5. The bottom valve filter device of a sewage pump according to claim 1, characterized in that: The diameter of the pressure plate (51) is equal to the maximum diameter of the valve disc (6), and the diameter of the pressure plate (51) is larger than the inner diameter of the valve seat (7). A threaded hole for fitting a bolt (8) is provided at the center of the pressure plate (51).

6. The bottom valve filter device for a sewage pump according to claim 1, characterized in that: The guide assembly (4) includes an outer cylinder (41), the inner wall of the outer cylinder (41) is connected to the inner cylinder (42), and a ball (43) is rotatably arranged between the outer cylinder (41) and the inner cylinder (42), and the outer wall of the ball (43) is in contact with the outer wall of the valve stem (5).

7. A sewage pump bottom valve filtering device according to claim 6, characterized in that: The diameter of the valve stem (5) is smaller than the inner diameter of the inner cylinder (42); the center of the support frame (3) is a cylindrical structure, and a threaded hole is provided on the top of the cylindrical structure; the maximum outer diameter of the outer cylinder (41) is equal to the outer diameter of the cylindrical structure, and a positioning hole is provided on the outer cylinder (41) corresponding to the threaded hole of the support frame (3).

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