Backwash reversing valve structure for high-pressure backwash filter station

Abstract

The utility model discloses a backwash reversing valve structure for a high-pressure backwash filter station, which comprises a hollow valve body, a movable valve core arranged in the valve body and a piston arranged on the valve core, the valve body comprises a liquid inlet valve seat, a guide sleeve connected with the liquid inlet valve seat, a liquid discharge valve seat and a valve sleeve which are connected with the guide sleeve, and a plug connected with the valve sleeve, a piston cavity used for containing a piston is formed in the plug, a high-pressure liquid channel is formed in the plug in a penetrating mode, the high-pressure liquid channel is communicated with the piston cavity, and a liquid inlet is formed in the bottom of the liquid inlet valve seat; liquid outlets are formed in the guide sleeve and comprise the upper liquid outlet and the lower liquid outlet, and a drain outlet is formed in the valve sleeve. The back-flushing reversing valve is reasonable in structural design, and by arranging the high-pressure liquid channel, when back-flushing operation needs to be carried out, high-pressure liquid passes through the high-pressure liquid channel to enable the piston and the valve element to move downwards, so that the liquid outlet is communicated with the drain outlet, and the function of back-flushing reversing is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of emulsion pump stations, and more specifically, to a backflush reversing valve structure for a high-pressure backflush filtration station. Background Art

[0002] The main function of the backflush reversing valve is that when the filtration station reaches a preset pressure difference value or running time value, by applying a force above the piston of the backflush reversing valve, the valve core is pushed downward to close the liquid inlet and open the sewage outlet, realizing the function of liquid flow reversal, so as to realize the backflush function of the filter element of the filtration station.

[0003] In the prior art, the functions of reversing and backwashing are mostly manually realized through stop valves, and the operation is relatively inconvenient. Summary of the Invention

[0004] The utility model overcomes the deficiencies of the prior art and provides a backflush reversing valve structure for a high-pressure backflush filtration station. Its structure is reasonably designed. By setting a high-pressure liquid channel, when backflush operation is required, high-pressure liquid is passed through the high-pressure liquid channel, so that the piston and the valve core move downward, thereby connecting the liquid outlet and the sewage outlet to realize the function of backflush reversal.

[0005] To achieve the above object, the utility model provides the following technical solutions:

[0006] A backflush reversing valve structure for a high-pressure backflush filtration station includes a hollow valve body, a valve core movably arranged in the valve body, and a piston arranged on the valve core. The valve body includes a liquid inlet valve seat, a guide sleeve connected to the liquid inlet valve seat, a liquid discharge valve seat and a valve sleeve connected to the guide sleeve, and a plug connected to the valve sleeve. A piston cavity for accommodating the piston is arranged in the plug, and a high-pressure liquid channel is penetrated and opened on the plug. The high-pressure liquid channel is communicated with the piston cavity. A liquid inlet is arranged at the bottom of the liquid inlet valve seat, and a liquid outlet is opened on the guide sleeve. The liquid outlet includes an upper liquid outlet and a lower liquid outlet. A sewage outlet is opened on the valve sleeve. When the piston moves downward, the valve core moves downward to block the liquid inlet and the lower liquid outlet, and makes the upper liquid outlet communicate with the sewage outlet; when the piston moves upward, the valve core moves upward to block the upper liquid outlet, and makes the liquid inlet communicate with the lower liquid outlet; a return spring abutting against the valve core is arranged in the liquid inlet valve seat. High-pressure liquid enters the high-pressure liquid channel and exerts a downward hydraulic thrust on the piston. The piston moves to compress the return spring, and the return spring provides an upward spring force for the piston and the valve core.

[0007] Preferably, a communication hole for communicating the high-pressure liquid channel and the piston cavity is arranged in the plug, and the aperture of the communication hole is smaller than the diameter of the piston cavity.

[0008] Preferably, a compression spring abutting against the piston is arranged between the valve sleeve and the plug. When the compression spring is in a normal state, it is partially accommodated in the spring groove of the valve sleeve.

[0009] Preferably, a step surface is formed between the spring groove and the piston cavity, and the piston abuts against the step surface when moving downward, and at this time the compression spring is compressed and located in the spring groove.

[0010] Preferably, the inlet valve seat and the guide sleeve, the guide sleeve and the discharge valve seat, the guide sleeve and the valve sleeve, and the valve sleeve and the screw plug are all connected by steel balls.

[0011] Preferably, the upper end of the inlet valve seat and the lower end of the discharge valve seat are both formed with inclined surfaces, and the upper and lower ends of the valve core are provided with matching surfaces that match the corresponding inclined surfaces.

[0012] Preferably, two upper liquid outlets are provided and are arranged opposite to each other on the left and right, and two lower liquid outlets are also provided and are arranged opposite to each other on the left and right.

[0013] Preferably, two sewage outlets are provided and arranged opposite to each other on the left and right.

[0014] Preferably, a step positioning groove is provided in the liquid inlet valve seat, and the return spring is arranged in the step positioning groove.

[0015] Preferably, the valve sleeve is arranged above the liquid discharge valve seat, and the valve sleeve is butt-jointed with the liquid inlet valve seat.

[0016] Beneficial effects of the utility model:

[0017] The utility model has a reasonable structural design. By setting a high-pressure liquid channel, when a recoil operation is required, high-pressure liquid passes through the high-pressure liquid channel, so that the piston and the valve core move downward, so that the liquid outlet and the sewage outlet are connected, so as to realize the recoil reversing function. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the structure of the utility model;

[0019] Figure 2 It is a schematic diagram of the working state of the utility model during specific implementation.

[0020] In the figure: 100, valve seat body; 1, valve body; 2, valve core; 3, piston; 4, liquid inlet valve seat; 41, liquid inlet; 42, return spring; 43, step positioning groove; 5, guide sleeve; 51, upper liquid outlet; 52, lower liquid outlet; 53, liquid outlet; 6, drain valve seat; 7, valve sleeve; 71, drain outlet; 72, compression spring; 73, spring groove; 74, step surface; 8, screw plug; 81, piston chamber; 82, high-pressure liquid channel; 83, connecting hole; 9, steel ball. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0022] like Figure 1-2 As shown, a backwash reversing valve structure for a high-pressure backwashing filter station includes a hollow valve body 1, a valve core 2 movably arranged in the valve body 1, and a piston 3 arranged on the valve core 2. The valve body 1 includes an inlet valve seat 4, a guide sleeve 5 connected to the inlet valve seat 4, a discharge valve seat 6 and a valve sleeve 7 connected to the guide sleeve 5, and a screw plug 8 connected to the valve sleeve 7. A piston cavity 81 for accommodating the piston 3 is arranged in the screw plug 8. A high-pressure liquid channel 82 is opened through the screw plug 8, and the high-pressure liquid channel 82 is communicated with the piston cavity 81. A liquid inlet port 41 is arranged at the bottom of the inlet valve seat 4, and a liquid outlet port 53 is opened on the guide sleeve 5. The liquid outlet 53 includes an upper liquid outlet 51 and a lower liquid outlet 52, and a drain port 71 is provided on the valve sleeve 7. When the piston 3 moves downward, the valve core 2 moves downward to block the liquid inlet 41 and the lower liquid outlet 52, and the upper liquid outlet 51 is connected to the drain port 71; when the piston 3 moves upward, the valve core 2 moves upward to block the upper liquid outlet 51, and the liquid inlet 41 is connected to the lower liquid outlet 52; a return spring 42 abutting against the valve core 2 is provided in the liquid inlet valve seat 4, and the high-pressure liquid enters the high-pressure liquid channel 82 and applies a downward hydraulic thrust to the piston 3, and the piston 3 moves to compress the return spring 42, and the return spring 42 is the piston 3 and the valve core 2 Increase the upward spring force; a connecting hole 83 for connecting the high-pressure liquid channel 82 and the piston chamber 81 is provided in the screw plug 8, and the aperture of the connecting hole 83 is smaller than the diameter of the piston chamber 81; a compression spring 72 abutting against the piston 3 is provided between the valve sleeve 7 and the screw plug 8, and the compression spring 72 is partially accommodated in the spring groove 73 of the valve sleeve 7 when it is in a normal state; a step surface 74 is formed between the spring groove 73 and the piston chamber 81, and the piston 3 will abut against the step surface 74 when it moves downward. At this time, the compression spring 72 is compressed and located in the spring groove 73; between the inlet valve seat 4 and the guide sleeve 5, between the guide sleeve 5 and the discharge valve seat 6, and between the guide sleeve 5 and the discharge valve seat 6 The sleeve 5 and the valve sleeve 7 as well as the valve sleeve 7 and the screw plug 8 are connected by steel balls 9; the upper end of the inlet valve seat 4 and the lower end of the discharge valve seat 6 are both formed with inclined surfaces, and the upper and lower ends of the valve core 2 are provided with matching surfaces that match the corresponding inclined surfaces; there are two upper liquid outlets 51 and they are arranged opposite to each other on the left and right, and there are also two lower liquid outlets 52 and they are arranged opposite to each other on the left and right; there are two sewage outlets 71 and they are arranged opposite to each other on the left and right; a step positioning groove 43 is provided in the inlet valve seat 4, and the return spring 42 is arranged in the step positioning groove 43; the valve sleeve 7 is arranged above the discharge valve seat 6, and the valve sleeve 7 is docked with the inlet valve seat 4.

[0023] By adopting the above technical solution, when the utility model is specifically implemented, two backflush reversing valves are installed on a valve seat body 100. Among them, the two backflush reversing valves are in parallel. The high-pressure liquid passage 82 of the valve body 1 is communicated with the valve seat body 100. The two liquid inlets 41 are communicated with each other, and the blowdown ports 71 between the two valve bodies 1 are communicated. During normal operation, the piston 3 and the valve core 2 on the valve body 1 are in the upper extreme position under the action of the compression spring 72 and the return spring 42. The valve core 2 moves upward to close the blowdown port 71. The high-pressure liquid enters from the liquid inlet 41 and flows out from the liquid outlet 53. When it is necessary to perform backflush operation on one of the valve bodies 1, the high-pressure liquid controlled by the pilot valve enters the piston chamber 81 through the high-pressure liquid passage 82 and the communication hole 83. Under the action of the liquid pressure of the high-pressure liquid, the piston 3 moves downward, and the valve core 2 also moves downward together, so as to close the liquid inlet 41, and at the same time make the blowdown port 71 communicate with the liquid outlet 53. Then, the high-pressure liquid flowing out from the liquid outlet 53 of the other backflush reversing valve flows to the blowdown port 71 of the valve body 1 that needs to be backflushed, realizing the backflush reversing function. After the backflush is completed, the other valve body 1 starts the backflush operation according to the same principle until all the valve bodies 1 complete the backflush operation in turn.

[0024] The above is only the preferred specific implementation manner of the utility model, but the protection scope of the utility model is not limited thereto. Any person skilled in the art within the technical scope disclosed by the utility model, according to the technical solution of the utility model and its inventive concept, makes equivalent replacement or change, and should be covered by the protection scope of the utility model.

Claims

1. A backwash reversing valve structure for a high-pressure backwashing filter station, comprising a hollow valve body (1), a valve core (2) movably arranged in the valve body (1), and a piston (3) arranged on the valve core (2), characterized in that: The valve body (1) comprises a liquid inlet valve seat (4), a guide sleeve (5) connected to the liquid inlet valve seat (4), a liquid discharge valve seat (6) and a valve sleeve (7) connected to the guide sleeve (5), and a screw plug (8) connected to the valve sleeve (7); a piston cavity (81) for accommodating a piston (3) is arranged in the screw plug (8); a high-pressure liquid channel (82) is provided through the screw plug (8); the high-pressure liquid channel (82) is communicated with the piston cavity (81); a liquid inlet (41) is arranged at the bottom of the liquid inlet valve seat (4); a liquid outlet (53) is provided on the guide sleeve (5); the liquid outlet (53) comprises an upper liquid outlet (51) and a lower liquid outlet (52); and a sewage outlet (71) is provided on the valve sleeve (7). 1), when the piston (3) moves downward, the valve core (2) moves downward to block the liquid inlet (41) and the lower liquid outlet (52), and the upper liquid outlet (51) is connected to the sewage outlet (71); when the piston (3) moves upward, the valve core (2) moves upward to block the upper liquid outlet (51), and the liquid inlet (41) is connected to the lower liquid outlet (52); a return spring (42) abutting against the valve core (2) is arranged in the liquid inlet valve seat (4), and the high-pressure liquid enters the high-pressure liquid channel (82) and applies a downward hydraulic thrust to the piston (3), and the movement of the piston (3) compresses the return spring (42), and the return spring (42) increases the upward spring force of the piston (3) and the valve core (2).

2. A backwash reversing valve structure for a high-pressure backwashing filter station according to claim 1, characterized in that: A connecting hole (83) for connecting the high-pressure liquid channel (82) and the piston chamber (81) is provided in the screw plug (8), and the hole diameter of the connecting hole (83) is smaller than the diameter of the piston chamber (81).

3. A backwash reversing valve structure for a high-pressure backwashing filter station according to claim 1 or 2, characterized in that: A compression spring (72) abutting against the piston (3) is arranged between the valve sleeve (7) and the screw plug (8); when the compression spring (72) is in a normal state, it is partially accommodated in the spring groove (73) of the valve sleeve (7).

4. A backwash reversing valve structure for a high-pressure backwashing filter station according to claim 3, characterized in that: A step surface (74) is formed between the spring groove (73) and the piston cavity (81). When the piston (3) moves downward, it abuts against the step surface (74). At this time, the compression spring (72) is compressed and located in the spring groove (73).

5. A backwash reversing valve structure for a high-pressure backwashing filter station according to claim 3, characterized in that: The inlet valve seat (4) and the guide sleeve (5), the guide sleeve (5) and the discharge valve seat (6), the guide sleeve (5) and the valve sleeve (7), and the valve sleeve (7) and the screw plug (8) are all connected via steel balls (9).

6. A backwash reversing valve structure for a high-pressure backwashing filter station according to claim 1 or 2, characterized in that: The upper end of the liquid inlet valve seat (4) and the lower end of the liquid discharge valve seat (6) are both formed with inclined surfaces, and the upper and lower ends of the valve core (2) are provided with matching surfaces that match the corresponding inclined surfaces.

7. A backwash reversing valve structure for a high-pressure backwashing filter station according to claim 6, characterized in that: Two upper liquid outlets (51) are provided and are arranged opposite to each other on the left and right sides, and two lower liquid outlets (52) are also provided and are arranged opposite to each other on the left and right sides.

8. A backwash reversing valve structure for a high-pressure backwashing filter station according to claim 7, characterized in that: Two sewage outlets (71) are provided and are arranged opposite to each other on the left and right sides.

9. A backwash reversing valve structure for a high-pressure backwashing filter station according to claim 3, characterized in that: A step positioning groove (43) is arranged in the liquid inlet valve seat (4), and a return spring (42) is arranged in the step positioning groove (43).

10. A backwash reversing valve structure for a high-pressure backwashing filter station according to claim 5, characterized in that: The valve sleeve (7) is arranged above the liquid discharge valve seat (6), and the valve sleeve (7) is butt-jointedly installed with the liquid inlet valve seat (4).

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