CN210440623U

CN210440623U - Multifunctional heavy hammer self-operated double-sealing swing check valve

Info

Publication number: CN210440623U
Application number: CN201921161705.6U
Authority: CN
Inventors: 金素衡; 林孙荣; 吴猛; 金克楚
Original assignee: Zhejiang Jingjia Valve Co ltd
Current assignee: Zhejiang Jingjia Valve Co ltd
Priority date: 2019-07-23
Filing date: 2019-07-23
Publication date: 2020-05-01
Anticipated expiration: 2029-07-23

Abstract

The utility model relates to a multifunctional heavy hammer self-operated double-sealing swing check valve, which comprises a valve body, a valve seat, a valve clack, a rocker, a valve cover and a rotating shaft; one end of the rotating shaft penetrates through the shaft hole to the outer side of the valve body to be connected with the heavy hammer device; the mounting frame is provided with a hydraulic oil cylinder device. When the valve clack is closed, the gravity of the heavy hammer increases the sealing specific pressure between the valve clack and the valve seat, so that the sealing performance is improved, and the leakage of a sealing pair is prevented; the piston rod can be pushed by a hydraulic system to forcibly close the valve clack, so that the valve has the functions of a check valve and a cut-off valve, and the cut-off valve such as a butterfly valve or a cut-off valve is not required to be additionally installed on a pipeline, so that the installation equipment of the pipeline system is reduced, and the equipment investment cost is reduced; and the hydraulic cylinder device has the slow closing effect in the closing process of the valve clack, so that the collision between sealing surfaces is reduced, and the water hammer is reduced.

Description

Multifunctional heavy hammer self-operated double-sealing swing check valve

Technical Field

The utility model belongs to the valve field especially relates to a swing check valve. The utility model is suitable for a pump station or the hydraulic turbine export of trades such as water conservancy, thermoelectricity, plumbing, metallurgy prevent the medium refluence, the check valve of protective apparatus safety.

Background

The swing check valve is widely applied to pump stations and water turbine outlets to prevent media from flowing backwards and protect the control valve of equipment safety. One of the disadvantages is: in a closed state, the valve clack and the valve seat mainly rely on reverse medium pressure to provide sealing force, the sealing specific pressure is small, and particularly when the outlet pressure fluctuation is large, leakage is easy to occur, and the sealing performance is poor; the second defect is that: need cut off the outlet pipe way when pump station, hydraulic turbine are maintained or are overhauld, so prior art still need install the butterfly valve that is used for promptly cutting off the pipeline when installing the check valve on the outlet pipe way, has increased system equipment input cost.

Disclosure of Invention

One of the purposes of the utility model is to provide a multifunctional heavy hammer self-operated double-sealing swing check valve with high sealing specific pressure and reliable sealing performance aiming at the defects existing in the prior art; the second purpose of the utility model is to provide a shortcoming that prior art exists, provide one kind and have promptly the cutting function, reduce the multi-functional weight self-operated double seal swing check valve of equipment input cost.

The technical scheme of the utility model comprises a valve body, a valve seat, a valve clack, a rocker, a valve cover and a rotating shaft, wherein the valve seat and the valve clack are provided with mutually matched sealing surfaces, one end of the rocker is connected with the center of the back surface of the valve clack, the other end of the rocker is fixedly connected with the middle of the rotating shaft, and the two ends of the rotating shaft are movably matched and connected with a shaft hole on the; one end of the rotating shaft penetrates through the shaft hole to the outer side of the valve body to be connected with the heavy hammer device; the heavy hammer device comprises a heavy hammer, a swing rod and a connector, wherein the connector is provided with an axial mounting hole and a radial mounting hole which are perpendicular to each other, a rotating shaft positioned outside the valve body is tightly matched with the axial mounting hole, one end of the swing rod is tightly matched with the radial mounting hole, the heavy hammer is fixed at the other end of the swing rod, two ends of the outer cylindrical surface of the axial mounting hole are in movable fit with positioning holes in a mounting frame, and the mounting frame is fixedly mounted on the valve body; the mounting frame is provided with a hydraulic oil cylinder device, the hydraulic oil cylinder device comprises an oil cylinder, a piston and a piston rod, cylindrical pins are symmetrically arranged on two sides of an outer cylinder body at the end part of one end of a rod cavity of the oil cylinder, the two cylindrical pins are movably mounted in two pin holes in the mounting frame, one end of the piston rod is hinged to a push rod on the connector, the push rod and the swing rod are respectively located on two sides of an outer cylindrical surface of the axial mounting hole, and central lines of the.

Preferably, the central line of the swing rod is vertically intersected with the central line of the rotating shaft and the central line of the push rod.

Preferably, bearings are respectively arranged between two ends of the outer cylindrical surface of the axial mounting hole and the positioning holes on two sides of the mounting frame.

Preferably, the sealing surface of the valve clack and the valve seat is formed by STL hard alloy surfacing, a circular groove is formed in the middle of the sealing surface of the valve clack, and a PTFE rubber sealing ring is embedded in the circular groove.

One of the beneficial effects of the utility model is that: the rotating shaft is connected with a heavy hammer device, when the valve clack is closed, the gravity of the heavy hammer increases the sealing specific pressure between the valve clack and the valve seat, the sealing performance is improved, and the leakage of a sealing pair is prevented; the utility model has the following beneficial effects: the end part of the rotating shaft is provided with a hydraulic oil cylinder device, the piston rod can be pushed through a hydraulic system, the valve clack is forcibly closed, the functions of a check valve and a cut-off valve are realized, the cut-off valves such as a butterfly valve or a cut-off valve do not need to be additionally arranged on a pipeline, the installation equipment of the pipeline system is reduced, and the equipment investment cost is reduced; and the hydraulic cylinder device has the slow closing effect in the closing process of the valve clack, so that the collision between sealing surfaces is reduced, and the water hammer is reduced.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

FIG. 2 is a schematic structural diagram of the heavy hammer device and the hydraulic cylinder device of the present invention.

Fig. 3 is an enlarged view of a portion of the structure of fig. 1.

In the figure: the device comprises a heavy hammer 1, a valve body 2, an oil cylinder 3, a valve clack 4, a valve seat 5, a valve cover 6, a rotating shaft 7, a rocker 8, a rocker 9, an axial mounting hole 10, a rubber sealing ring 11, a mounting frame 12, a push rod 13, a cylindrical pin 14, a piston rod 15 and a piston 16.

Detailed Description

The multifunctional heavy hammer self-force double-sealing swing check valve shown in fig. 1 comprises a valve body 2, a valve seat 5, a valve clack 4, a rocker 8, a valve cover 6 and a rotating shaft 7, wherein the valve seat 5 and the valve clack 4 are provided with mutually matched sealing surfaces, one end of the rocker 8 is connected with the center of the back surface of the valve clack 4, the other end of the rocker 8 is fixedly connected with the middle of the rotating shaft 7, two ends of the rotating shaft 7 are movably matched and connected with a shaft hole in the valve body 2, so that the rocker 8 and the valve clack 4 rotate together by taking the rotating shaft 7 as a center, an included angle is formed between; it is characterized in that one end of the rotating shaft 7 passes through the shaft hole to the outer side of the valve body 2 to be connected with the heavy hammer device; the heavy hammer device comprises a heavy hammer 1, a swing rod 9 and a connector, wherein the connector is provided with an axial mounting hole 10 and a radial mounting hole which are perpendicular to each other, the axial mounting hole 10 is perpendicular to the central line of the radial mounting hole, the central line of the axial mounting hole 10 is coincident with the central line of a rotating shaft 7, the end part of the rotating shaft 7 positioned outside a valve body 2 is tightly matched and mounted with the axial mounting hole 10, one end of the swing rod 9 is tightly matched and mounted with the radial mounting hole, the heavy hammer 1 is fixed at the other end of the swing rod 9, a mounting frame 12 is fixed on the outer wall of the valve body 2 positioned on one side of the rotating shaft 7, two ends of the outer cylindrical surface of the axial mounting hole 10 are movably matched with positioning holes on the mounting frame 12, when a forward medium pushes a valve flap 4 to be opened rotationally, the rotating shaft 7 is driven to rotate, the heavy hammer 1 is, the leakage of the sealing pair is avoided; the mounting frame 12 is provided with a hydraulic oil cylinder device, the hydraulic oil cylinder device comprises a cylinder body 3, a piston 16 and a piston rod 15, cylindrical pins 14 are symmetrically arranged on two sides of an outer cylinder body at the end part of one end of a rod cavity of the cylinder body 3, the two cylindrical pins 14 are movably mounted in pin holes on two sides of the mounting frame 12, one end of the piston rod 15 is hinged with a push rod 13 on a connector, the push rod 13 and the swing rod 9 are respectively positioned on two sides of an outer cylindrical surface of the axial mounting hole 10, and central lines of the push rod 13 and. When the rotating shaft 7 rotates, the connector drives the push rod 13 and the heavy hammer 1 on two sides to rotate by taking the center line of the axial mounting hole 10 as a center, when the valve clack 4 is in an opening state, the piston 16 is positioned on one side of the cylinder 3 with the rod cavity, and when the valve clack 4 is in a closing state, the piston 16 is positioned on one side of the cylinder 3 without the rod cavity. The rod cavity and the rodless cavity of the cylinder body 3 are communicated with a hydraulic pipeline, when high-pressure oil is input into the rod cavity of the cylinder body 3, the piston 16 is pushed to move towards the rod cavity of the cylinder body 3, the piston rod 15 pulls the connector and the rotating shaft 7 to rotate, the valve clack 4 is driven to rotate and forcibly close the valve seat 5, the function of a cut-off valve of a butterfly valve or a stop valve during system maintenance and overhaul is achieved, the installation quantity of valves on the pipeline is reduced, and the equipment investment cost is reduced. Meanwhile, in the process that the valve clack 4 is pushed to close by reverse medium pressure, the hydraulic oil cylinder device has a slow closing effect, and the closing water hammer is reduced.

The central line of the swing rod 9 is vertically crossed with the central line of the rotating shaft 7 and the central line of the push rod 13.

And bearings are respectively arranged between two ends of the outer cylindrical surface of the axial mounting hole 10 and the positioning holes on two sides of the mounting frame 12, so that the rotating friction force of the connecting frame is reduced.

The sealing surface of the valve flap 4 and the valve seat 5 is formed by STL hard alloy surfacing, a circular groove is formed in the middle of the sealing surface of the valve flap 4, a PTFE rubber sealing ring 11 is embedded in the circular groove, the valve flap 4 and the valve seat 5 form a multi-sealing structure with hard sealing at two sides and soft sealing at the middle when being closed, and meanwhile, the rubber sealing ring 11 is firstly contacted with the valve seat 5 when the valve flap 4 is closed, so that the collision of the sealing surface is reduced, as shown in figure 3.

Claims

1. A multifunctional heavy hammer self-operated double-sealing swing check valve comprises a valve body (2), a valve seat (5), a valve clack (4), a rocker (8), a valve cover (6) and a rotating shaft (7), wherein the valve seat (5) and the valve clack (4) are provided with mutually matched sealing surfaces, one end of the rocker (8) is connected with the center of the back surface of the valve clack (4), the other end of the rocker is fixedly connected with the middle of the rotating shaft (7), and two ends of the rotating shaft (7) are movably matched and connected with a shaft hole in the valve body (2); one end of a rotating shaft (7) penetrates through the shaft hole to the outer side of the valve body (2) to be connected with a heavy hammer device; the heavy hammer device comprises a heavy hammer (1), a swing rod (9) and a connector, wherein the connector is provided with an axial mounting hole (10) and a radial mounting hole which are perpendicular to each other, the end part of a rotating shaft (7) positioned outside a valve body (2) is tightly matched with the axial mounting hole (10), one end of the swing rod (9) is tightly matched with the radial mounting hole, the heavy hammer (1) is fixed at the other end of the swing rod (9), a mounting frame (12) is fixed on the outer wall of the valve body (2) positioned on one side of the rotating shaft (7), and two ends of the outer cylindrical surface of the axial mounting hole (10) are movably matched with positioning holes in the mounting frame (12); be equipped with the hydraulic cylinder device on mounting bracket (12), this hydraulic cylinder device includes cylinder body (3), piston (16), piston rod (15), the outer cylinder body bilateral symmetry that cylinder body (3) had pole chamber one end tip sets up cylindric lock (14), two cylindric lock (14) movable mounting are in the both sides pinhole on mounting bracket (12), piston rod (15) one end is articulated with push rod (13) on the connector, push rod (13) and pendulum rod (9) are located axial mounting hole (10) outer face of cylinder both sides respectively, central line mutually perpendicular between them.

2. The multi-functional weight self-operated double sealing swing check valve as claimed in claim 1, wherein the center line of the swing link (9) is perpendicular to the center line of the rotation shaft (7) and the center line of the push rod (13).

3. The multi-functional weight self-operated double sealing swing check valve as claimed in claim 1 or 2, wherein bearings are respectively installed between both ends of the outer cylindrical surface of the axial installation hole (10) and the positioning holes on both sides of the installation frame (12).

4. The multi-functional weight self-operated double-sealing swing check valve as claimed in claim 1 or 2, wherein the sealing surface of the valve flap (4) and the valve seat (5) is formed by STL hard alloy bead welding, and a circular groove is formed in the middle of the sealing surface of the valve flap (4) and is embedded with a PTFE rubber sealing ring (11).