CN204827299U - Back flush is valve member for filter - Google Patents

Abstract

The utility model discloses a valve assembly for a backwash filter, which comprises a valve body, a liquid inlet, a liquid outlet, a liquid inlet valve core, a one-way valve, a push rod valve core and a control oil passage provided on the valve body There is a channel in the valve body. One end of the channel of the valve body is the liquid inlet, and the other end of the channel is provided with a plug. The liquid inlet valve core and the ejector valve core are arranged side by side in the channel. The side part is corresponding to the liquid inlet valve core, the control oil passage is connected with the pushing end of the ejector rod valve core in the channel, and the reverse flow port is located between the ejector rod valve core and the liquid inlet valve core; the inlet of the one-way valve is connected with the The liquid inlet is connected, and the outlet of the one-way valve is connected with the control oil passage. The backwashing is controlled by a one-way valve, the operating torque is small, and the operation is light and convenient. The liquid inlet valve core and the liquid outlet valve core are arranged side by side in the same channel, which has a simple structure and takes up little space.

Description

Valve assembly for backwash filter

technical field

The utility model relates to the technical field of valves, in particular to a valve assembly for backwashing filters.

Background technique

The traditional manual backwash filter is a steel ball direct-acting structure with a large product size and a long handle. The operating torque is very large under the working pressure. The space required for the handle operation in the mine is relatively large, and it is inconvenient to use. Especially on some small supports, the installation position of the backwash filter is very small, and the operating space is very narrow. Because of the inconvenience of operation, underground workers are often reluctant to operate, which will cause the filter element to be blocked for a long time and affect the use.

Utility model content

Aiming at the deficiencies of the prior art, the technical problem to be solved by the utility model is to provide a valve assembly for a backwash filter, so as to achieve the purpose of easy operation.

In order to solve the problems of the technologies described above, the technical solution adopted in the utility model is:

A valve assembly for a backwash filter, including a valve body, a liquid inlet, a liquid outlet, a liquid inlet valve core, a check valve, a push rod valve core, and a control oil passage and a reverse flow port on the valve body, There is a channel in the valve body. One end of the channel of the valve body is the liquid inlet, and the other end of the channel is provided with a plug. The liquid inlet valve core and the ejector valve core are arranged side by side in the channel. Corresponding to the spool, the control oil passage is connected with the pushing end of the ejector spool in the passage, and the reverse flow port is located between the ejector spool and the liquid inlet spool; the inlet of the check valve is connected with the liquid inlet , the outlet of the one-way valve communicates with the control oil passage.

The one-way valve includes a handle, a push rod, and a spring spool, one end of the handle is hinged to one end of the push rod, and the other end of the push rod corresponds to the spring spool.

The liquid inlet spool includes a valve sleeve arranged in the channel, and an outer valve cylinder and an inner valve cylinder sleeved together are arranged in the valve sleeve, and a compression spring is arranged in a cavity formed between the outer valve cylinder and the inner valve cylinder.

The ejector spool includes a piston and an ejector rod, the ejector rod is arranged at one end of the piston, and the other end of the piston in the passage communicates with the control oil passage.

Compared with the prior art, the utility model has the following advantages: the backwashing is controlled by the one-way valve, the operating torque is small, the operation is light and convenient, the liquid inlet valve core and the liquid outlet valve core are arranged side by side in the same channel, and the structure is simple. Small footprint.

Description of drawings

The following is a brief description of the content expressed in the drawings of this manual and the marks in the drawings:

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

In the figure: 1. Liquid inlet, 2. Liquid inlet spool, 3. Liquid outlet, 4. Positioning plate, 5. Control oil passage, 6. Plug, 7. Piston, 8. Push rod, 9. Single to the valve.

Detailed ways

The specific implementation of the present utility model will be described in further detail below by describing the embodiments with reference to the accompanying drawings.

As shown in Figure 1, the valve assembly for the backwash filter includes a valve body, a liquid inlet 1, a liquid outlet 3, a liquid inlet spool 2, a one-way valve 9, a push rod spool and a control on the valve body. The oil passage 5 and the reverse flow port, wherein the valve body is a hollow cylinder structure, and a channel is arranged in the valve body along the axial direction.

One end of the channel of the valve body is the liquid inlet 1, and the other end of the channel is provided with a plug 6. The other end of the channel is sealed by the plug.

The liquid inlet valve core and the ejector rod valve core are arranged side by side in the channel, the liquid inlet valve core and the liquid inlet are arranged close to each other, and the ejector rod valve core and the plug 6 are arranged close to each other.

The liquid outlet is set on the side of the valve body corresponding to the inlet spool, the control oil passage is connected with the pushing end of the ejector spool in the channel, and the reverse flow port is located between the ejector spool and the inlet spool.

The inlet of the one-way valve 9 is connected with the liquid inlet, and the outlet of the one-way valve is connected with the control oil passage. Check valve 9 is fixed on the valve body, is pilot valve, and check valve comprises handle, push rod, spring spool, and handle one end is hinged with push rod one end, and push rod other end is corresponding with spring spool. The inlet and outlet of the one-way valve are controlled by the handle, and the handle uses the principle of leverage, so the operating torque is small and the operation is easy.

The ejector spool includes a piston 7 and an ejector rod 8, the ejector rod is arranged at one end of the piston, and the other end of the piston in the passage communicates with the control oil passage. And in the channel, a positioning plate 4 is fixed between the liquid inlet valve core and the ejector pin valve core, the ejector pin is covered with a coil spring, and the coil spring is compressed and located between the piston and the positioning plate.

The liquid inlet valve core includes a valve sleeve arranged in the passage, and an outer valve cylinder and an inner valve cylinder are arranged in the valve sleeve, and a compression spring is arranged in a cavity formed between the outer valve cylinder and the inner valve cylinder. The channel of the valve body forms a liquid inlet valve port corresponding to the outer valve cylinder, and forms a reverse flow liquid outlet valve port corresponding to the inner valve cylinder.

The outer valve cylinder can slide in the valve sleeve, the outer valve cylinder corresponds to the direction of the liquid inlet valve, and the inner valve cylinder corresponds to the ejector rod; for normal liquid intake, the liquid enters through the liquid inlet to push the outer valve cylinder to open the liquid inlet valve port. Realize the passage between the liquid inlet and the liquid outlet; operate the handle of the one-way valve, the oil enters the control oil passage through the one-way valve, and then enters the piston end of the ejector spool through the control oil passage, pushing the piston to move, and the piston goes up The ejector rod pushes the inner valve cylinder, and the inner valve cylinder drives the outer valve cylinder to move towards the liquid inlet together. The liquid inlet valve is closed, the reverse flow outlet valve is opened, the liquid outlet is connected with the reverse flow port, and the reverse flow port is the reverse flow port. Flush the drain.

The utility model has been exemplarily described above in conjunction with the accompanying drawings. Obviously, the specific implementation of the utility model is not limited by the above-mentioned method, as long as various insubstantial improvements made by the idea and technical solutions of the utility model are adopted, or there is no The design and technical solutions of the utility model that are directly applied to other occasions through improvement are all within the protection scope of the utility model.

Claims (4)

1. A valve assembly for a backwash filter, comprising a valve body, a liquid inlet, a liquid outlet, and a liquid inlet spool, characterized in that: it also includes a check valve, a push rod spool and a control oil on the valve body There is a passage in the valve body, one end of the passage of the valve body is the liquid inlet, and the other end of the passage is provided with a plug. The side of the body corresponds to the inlet spool, the control oil passage is connected with the pushing end of the ejector spool in the passage, and the reverse flow port is located between the ejector spool and the inlet spool; the inlet of the one-way valve It is connected with the liquid inlet, and the outlet of the one-way valve is connected with the control oil passage. 2. The valve assembly for the backwash filter according to claim 1, wherein the one-way valve comprises a handle, a push rod, and a spring valve core, one end of the handle is hinged to one end of the push rod, and the other end of the push rod is connected to the spring valve. corresponding to the core. 3. The valve assembly for backwashing filter according to claim 1, characterized in that: the liquid inlet valve core includes a valve sleeve arranged in the channel, and the valve sleeve is provided with an outer valve cylinder and an inner valve cylinder nested together , A compression spring is arranged in the cavity formed between the outer valve cylinder and the inner valve cylinder. 4. The valve assembly for backwashing filter according to claim 1, wherein the ejector spool includes a piston and an ejector rod, the ejector rod is arranged at one end of the piston, and the other end of the piston in the channel communicates with the control oil channel .