CN214789205U - Pneumatic three-way stop valve for large diaphragm pump - Google Patents

Abstract

The utility model provides a pneumatic three-way stop valve for large-scale diaphragm pump belongs to industrial pump technical field, the utility model discloses can be under the condition that does not influence diaphragm pump normal operating, through refuel or the volume that the automatic accurate control pump head hydraulic oil was realized to the oil drain, signal and valve body structure common control to tee bend, one-way and three kinds of functions that end realize the low pressure and supply hydraulic oil outward. The utility model discloses a valve plate, a serial communication port, the valve plate sets up has the orificial pump oil pipeline of pump oil, tank filler sleeve, oil drain, the tank filler sleeve with the oil drain all with pump oil pipeline intercommunication, the cooperation the tank filler sleeve is provided with the check valve, the cooperation the oil drain is provided with the nozzle, the outside of check valve is provided with the fuel filler valve, the outside of nozzle is provided with the fuel drain, the fuel filler valve with the oil drain is all fixed on the valve plate, the fuel filler valve with the structure of oil drain is the same, the fuel filler valve with all be provided with oil pipe interface and gas pipe hole on the oil drain.

Description

Pneumatic three-way stop valve for large diaphragm pump

Technical Field

The utility model belongs to the technical field of the industrial pump, specifically relate to a pneumatic three-way stop valve for large-scale diaphragm pump.

Background

The pump head of the known large diaphragm pump needs to be pre-filled with a certain amount of hydraulic oil, but the pre-filled hydraulic oil is easy to be excessive or insufficient during manual pre-filling, and the hydraulic oil is lost during the reciprocating motion of the piston. The optimal volume of hydraulic oil is an important parameter for improving the pumping efficiency, and the over-high or over-low hydraulic oil charge can reduce the pumping efficiency and even cause component damage.

In addition, the rated conveying pressure of the large diaphragm pump is high, and the reciprocating motion frequency is high, so that the pressure fluctuation in the pump head is large, and the pressure difference between the hydraulic oil in the pump head and the externally supplied hydraulic oil is large. The action of the signal control valve is delayed relative to the change of the pumping pressure difference, so that the problem that hydraulic oil in the pump head flows back to an external supply hydraulic pipeline is easily caused, and accurate quantification cannot be realized. If the external supply hydraulic oil higher than the rated conveying pressure is adopted, the phenomenon that the hydraulic oil in the pump head is too high is easily caused, and the pumping efficiency is reduced.

Disclosure of Invention

Aiming at the problems, the utility model makes up the defects of the prior art and provides a pneumatic three-way stop valve for a large diaphragm pump; the utility model discloses can realize the capacity of automatic accurate control pump head hydraulic oil through refueling or oil discharge under the condition that does not influence diaphragm pump normal operating, signal and valve body structure common control to tee bend, one-way and three kinds of functions that end realize the low pressure and supply hydraulic oil outward.

In order to achieve the above purpose, the utility model adopts the following technical scheme.

The utility model provides a pneumatic three-way stop valve for large-scale diaphragm pump, including the valve plate, its characterized in that, the valve plate sets up pump oil pipeline, tank filler sleeve, the oil drain that has the pump oil mouth of pipe, the tank filler sleeve with the oil drain all with pump oil pipeline intercommunication, cooperation the tank filler sleeve is provided with the check valve, the cooperation the oil drain is provided with the nozzle, the outside of check valve is provided with the fuel filler valve, the outside of nozzle is provided with the oil drain, the fuel filler valve with the oil drain is all fixed on the valve plate, the fuel filler valve with the structure of oil drain is the same, the fuel filler valve with all be provided with oil pipe interface and gas pipe hole on the oil drain.

Furthermore, the oil filling valve and the oil drain valve both comprise a valve body, a valve cover is arranged by matching with the valve body, the air pipe hole is arranged on the valve cover and connected into the valve body, a bowl-shaped small diaphragm is correspondingly arranged between the valve cover and the valve body, a press cover is arranged by matching with the bowl-shaped small diaphragm, the press cover is connected with a valve rod through a set screw, a first guide ring and a second guide ring are arranged by penetrating through the valve rod and corresponding to the valve body, a large spring is correspondingly arranged between the first guide ring and the press cover and sleeved outside the valve rod, an inner sealing O-shaped ring, a sealing ring and an outer sealing O-shaped ring are arranged on the second guide ring, a positioning retaining ring is arranged at the bottom end of the second guide ring, an installation cavity is formed by the positioning retaining ring and the bottom end of the valve body, the oil pipe interface is communicated with the installation cavity, and the one-way valve is arranged in the installation cavity of the oil filling valve, the nozzle sets up the installation intracavity of fuel outlet valve, the bottom of valve rod extends to the installation intracavity and the cooperation is provided with nonmetal inserts.

Furthermore, the valve cover and the valve body are detachably connected through a socket head cap screw.

Furthermore, a non-metal ring gasket is arranged between the bowl-shaped small diaphragm and the valve cover.

Further, the upper surface of the one-way valve is arranged in parallel with the lower surface of the non-metal insert.

Furthermore, the one-way valve comprises a one-way valve body, a one-way valve seat and a one-way valve core, the one-way valve core is movably arranged in the one-way valve body in a matching way, the top of the one-way valve body is provided with a spray hole connected to the one-way valve core, the center of the one-way valve core is provided with a blind hole, the one-way valve seat is provided with a convex rod which is matched and extended into the blind hole, the outer spigot of the one-way valve seat corresponds to the inner spigot of the one-way valve body, the center of the one-way valve seat is provided with a small-diameter oil discharge through hole, the outer ring of the bottom of the one-way valve seat is provided with at least one oil through hole, the root of the convex rod is provided with a spring positioning boss matched with which a small spring is detachably arranged, the small spring is sleeved outside the one-way valve core, the upper part of the one-way valve core corresponds to the small spring, and a sealing block and a gasket are correspondingly arranged between the small springs on the upper part of the one-way valve core.

Furthermore, an annular groove is further formed in the one-way valve body, and a sealing O-shaped ring is detachably arranged in the annular groove.

Further, the oil filling valve and the one-way valve are coaxially arranged, and the oil discharging valve and the nozzle are coaxially arranged.

Further, the installation depth of the check valve and the nozzle exceeds the central axis of the oil pumping pipeline.

Furthermore, the oil filling valve and the oil drain valve are both provided with silencer mounting holes, and silencers are mounted in the silencer mounting holes.

The beneficial effects of the utility model.

The utility model provides a signal control is first level condition control, and hydraulic oil and outer hydraulic oil pressure differential that supplies are second level condition control in the pump head to the integration refuels and the function of bleeding, forms three-way stop valve's form. The stable air source and the spring reset electromagnetic directional valve form first-level condition control, the pressure difference formed by hydraulic oil in the pump head and externally supplied low-pressure hydraulic oil and the check valve form second-level condition control, and the capacity of the hydraulic oil of the pump head is automatically and accurately controlled by adding or discharging oil under the condition that the normal operation efficiency of the diaphragm pump is not influenced, so that the damage probability of parts can be reduced.

Drawings

In order to make the technical problem, technical scheme and beneficial effect that the utility model solved more clearly understand, it is right to combine the attached drawing and detailed description mode below the utility model discloses further detailed description. It should be understood that the detailed description and specific examples, while indicating the invention, are given by way of illustration only.

Fig. 1 is an overall front sectional view of the present invention.

Fig. 2 is a front sectional view of the fuel filler valve and the fuel drain valve of the present invention.

Fig. 3 is a front sectional view of the check valve of the present invention.

Fig. 4 is a schematic view of the working connection principle of the present invention.

The labels in the figure are: 1 is a valve plate, 2 is an oil pumping pipeline, 3 is an oil filling hole, 4 is an oil drain hole, 5 is a one-way valve, 6 is a nozzle, 7 is an oil filling valve, 8 is an oil drain valve, 9 is an oil pipe connector, 10 is a valve body, 11 is a valve cover, 12 is an air pipe hole, 13 is a bowl-shaped small diaphragm, 14 is a press cover, 15 is a set screw, 16 is a valve rod, 17 is a first guide ring, 18 is a second guide ring, 19 is a large spring, 20 is an inner sealing O-shaped ring, 21 is a sealing ring, 22 is an outer sealing O-shaped ring, 23 is a positioning check ring, 24 is an installation cavity, 25 is a non-metal insert, 26 is a hexagonal screw, 27 is a non-metal ring gasket, 28 is a one-way valve body, 29 is a one-way valve seat, 30 is a one-way valve core, 31 is a spray hole, 32 is a blind hole, 33 is a convex rod, 34 is a small-diameter oil discharge through hole, 35 is an oil discharge through hole, 36 is a spring positioning boss, 37 is a small spring, 38 is a sealing block, 39 is a gasket, 40 is a sealing O-shaped ring, 41 is a silencer mounting hole, 42 is a silencer, 43 is an air source, 44 is a low-pressure hydraulic oil source, 45 is a hydraulic oil tank, 46 is a diaphragm pump, 47 is an oil filling signal, 48 is an oil discharging signal, 49 is an oil filling electromagnetic valve, 50 is an oil discharging electromagnetic valve, and 51 is an oil pumping pipe orifice.

Detailed Description

As shown in fig. 1-3, the present embodiment includes a valve plate 1, the valve plate 1 is provided with a pump oil pipeline 2 with a pump oil nozzle 51, an oil filling hole 3 and an oil drain hole 4, and the pump oil nozzle 51 is used for connecting an external oil pump 46. The oil filling hole 3 and the oil drain hole 4 are both communicated with the pump oil pipeline 2, the matched oil filling hole 3 is provided with a one-way valve 5, the matched oil drain hole 4 is provided with a nozzle 6, the outside of the one-way valve 5 is provided with an oil filling valve 7, the outside of the nozzle 6 is provided with an oil drain valve 8, the oil filling valve 7 and the oil drain valve 8 are both fixed on the valve plate 1, the oil filling valve 7 and the oil drain valve 8 are identical in structure, the oil filling valve 7 and the oil drain valve 8 are both provided with an oil pipe interface 9 and an air pipe hole 12, the oil pipe interface 9 of the oil filling valve 7 is used for being connected with an external low-pressure hydraulic oil source 44, the oil pipe interface 9 of the oil drain valve 8 is used for being connected with an external hydraulic oil tank 45, the air pipe hole 12 of the oil filling valve 7 is used for being connected with an air pipe of an oil filling electromagnetic valve 49 connected with the outside, and the air pipe hole 12 of the oil drain valve 8 is used for being connected with an air pipe of an external oil drain electromagnetic valve 50.

Add oil valve 7 and fuel outlet valve 8 and all include valve body 10, and cooperation valve body 10 is provided with valve gap 11, and valve gap 11 passes through hexagon socket head cap screw 26 with valve body 10 and can dismantle the connection.

The air pipe hole 12 is arranged on the valve cover 11 and connected to the valve body 10, a bowl-shaped small diaphragm 13 is correspondingly arranged between the valve cover 11 and the valve body 10, and a non-metal ring gasket 27 is also arranged between the bowl-shaped small diaphragm 13 and the valve cover 11.

A press cover 14 is arranged by matching with the bowl-shaped small diaphragm 13, the press cover 14 is connected with a valve rod 16 through a set screw 15, a first guide ring 17 and a second guide ring 18 are arranged by penetrating the valve rod 16 and corresponding to the valve body 10, a large spring 19 is correspondingly arranged between the first guide ring 17 and the press cover 14, the large spring 19 is sleeved outside the valve rod 16, an inner sealing O-shaped ring 20, a sealing ring 21 and an outer sealing O-shaped ring 22 are arranged on the second guide ring 18, a positioning retainer ring 23 is arranged at the bottom end of the second guide ring 18, the positioning retainer ring 23 and the bottom end of the valve body 10 form a mounting cavity 24, an oil pipe interface 9 is communicated to the mounting cavity 24, the check valve 5 is arranged in the mounting cavity 24 of the oil filling valve 7, the nozzle 6 is arranged in the mounting cavity 24 of the oil discharging valve 8, the bottom end of the valve rod 16 extends to the mounting cavity 24 and is matched with a non-metal insert 25, the upper surface of the check valve 5 is arranged in parallel to the lower surface of the non-metal insert 25, forming a sealing end face while limiting the stroke of the valve stem 16.

The oil filling valve 7 and the oil discharging valve 8 are provided with silencer mounting holes 41, and silencers 42 are mounted in the silencer mounting holes 41.

The check valve 5 comprises a check valve body 28, a check valve seat 29 and a check valve core 30, wherein the check valve core 30 is movably arranged in the check valve body 28 in a matched mode, a spray hole 31 connected to the check valve core 31 is formed in the top of the check valve body 28, an annular groove is further formed in the check valve body 28, and a sealing O-shaped ring 40 is detachably arranged in the annular groove.

The center of the one-way valve core 30 is provided with a blind hole 32, the one-way valve seat 29 is provided with a convex rod 33 which is matched and extends into the blind hole 32, an outer spigot of the one-way valve seat 29 corresponds to an inner spigot of the one-way valve body 28, the center of the one-way valve seat 29 is provided with a small-diameter oil discharge through hole 34, the outer ring of the bottom of the one-way valve seat 29 is provided with at least one oil through hole 35, the root of the convex rod 33 is provided with a spring positioning boss 36, the matched spring positioning boss 36 is detachably provided with a small spring 37, the small spring 37 is sleeved outside the one-way valve core 30, the upper part of the one-way valve core 30 corresponds to the small spring 37, and a sealing block 38 and a gasket 39 are correspondingly arranged between the small springs 37 on the upper part of the one-way valve core 30.

The oil filling valve 7 and the one-way valve 5 are coaxially arranged, the oil discharging valve 8 and the nozzle 6 are coaxially arranged, the shape of the nozzle 6 is similar to that of the one-way valve 5, and the center of the nozzle 6 is provided with a through oil port and is arranged on the valve plate 1 through threads. The installation depth of the check valve 5 exceeds the central axis of the oil pumping pipeline 2.

And the three-way stop valve is connected with the outside.

As shown in fig. 4, the air pipe hole 12 of the oil filling valve 7 is connected to an external oil filling solenoid valve 49 through an air pipe, the oil filling solenoid valve 49 is connected to both the air source 43 and a PLC for controlling the oil filling signal 47, the air pipe hole 12 of the oil drain valve 8 is connected to an external oil drain solenoid valve 50 through an air pipe, and the oil drain solenoid valve 50 is connected to both the air source 43 and a PLC for controlling the oil drain signal 48.

The oil pipe interface 9 of the oil filling valve 7 is connected to an external hydraulic oil tank 45 through a pipeline, the oil pipe interface 9 of the oil discharging valve 8 is connected to an external low-pressure hydraulic oil source 44 through a pipeline, and the pump oil pipe opening 51 of the valve plate 1 is connected to the pump head of the diaphragm pump 46.

The working principle is as follows.

The pneumatic three-way stop valve can realize the functions of stop, one-way and three-way.

When the external detection element does not detect that the hydraulic oil in the pump head of the diaphragm pump 46 is excessive or too small, the state is normal, and the pneumatic three-way stop valve is in a closed and cut-off state. The oil filling electromagnetic valve 49 and the oil discharging electromagnetic valve 50 are both communicated with the air source 43 under the action of spring force, air is filled into an air cavity formed by the bowl-shaped small diaphragm 13 of the oil filling valve 7 and the valve cover 11 of the oil filling valve 7, and the pressure of the air cavity is transmitted to the valve rod 16 of the oil filling valve 7; meanwhile, the air chamber formed by the bowl-shaped small diaphragm 13 of the oil drain valve 8 and the valve cover 11 of the oil drain valve 8 is inflated, and the pressure of the air chamber is transmitted to the valve rod 16 of the oil drain valve 8. The bottom of a valve rod 16 of the oil filling valve 7 is contacted with the top of the one-way valve 5, the bottom of a valve rod 16 of the oil discharging valve 8 is contacted with the top of the nozzle 6, and an oil path for filling and discharging oil is closed and is in a cut-off state.

The cut-off function is thus achieved.

When the external detection element detects that the hydraulic oil amount in the pump head of the diaphragm pump 46 is low, an oil filling signal 47 is given out through PLC control, an electromagnet of an oil filling electromagnetic valve 49 is switched in an electrified mode, the oil filling valve 7 is communicated with the atmosphere to exhaust, the bottom of a valve rod 16 of the oil filling valve 7 is separated from the top of the one-way valve 5, and an oil filling oil path is opened. The pump head pressure of the diaphragm pump 46 fluctuates, and when the pressure in the pump head of the diaphragm pump 46 is lower than the pressure of the low-pressure hydraulic oil source 44 during the pulp suction stroke, the check valve 5 is opened for oil filling. When the pressure in the pump head of the diaphragm pump 46 is higher than the pressure of the connected low-pressure hydraulic oil source 44, the check valve 5 closes and blocks the oil path until the oil filling signal 47 disappears, and the oil filling valve 7 returns to the normal state and is cut off.

When the external detection element detects that the hydraulic oil in the pump head of the diaphragm pump 46 is excessive, an oil discharge signal 48 is given out through PLC control, an electromagnet of an oil discharge electromagnetic valve 50 is electrified and reversed, the oil discharge valve 8 is communicated with the atmosphere to exhaust air, and the bottom of a valve rod 16 of the oil discharge valve 8 is separated from the top of the nozzle 6. The pump head of the diaphragm pump 46 fluctuates, and during the discharging stroke, oil is discharged when the pressure of the pump head of the diaphragm pump 46 is higher than the pressure of the connected hydraulic oil tank 45 (i.e., atmospheric pressure). Until the oil drain signal 48 disappears, the oil drain valve 8 returns to normal cut-off.

Thus, the one-way function is realized.

The pneumatic three-way stop valve is directly communicated with hydraulic oil in a pump head of the diaphragm pump through an oil pipe, communicated or stopped with an oil pipe connector 9 of the oil filling valve 7 through the one-way valve 5 and the oil filling valve 7, and communicated or stopped with an oil pipe connector 9 of the oil discharging valve 8 through the nozzle 6 and the oil discharging valve 8. In the first state, the oil filling valve 7 and the oil discharging valve 8 are all closed; in the second state, the oil filling valve 7 is opened, the one-way valve 5 is automatically opened and closed, and the oil drain valve 8 is closed; and in the third state, the oil drain valve 8 is opened, and the oil filling valve 7 is closed.

Thus, the three-way function is realized.

It should be understood that the above detailed description of the present invention is only for illustrating the present invention and is not limited by the technical solutions described in the embodiments of the present invention, and those skilled in the art should understand that the present invention can still be modified or equivalently replaced to achieve the same technical effects; as long as the use requirement is satisfied, the utility model is within the protection scope.

Claims (10)

1. A pneumatic three-way stop valve for a large diaphragm pump comprises a valve plate (1) and is characterized in that, the valve plate (1) is provided with an oil pumping pipeline (2) with an oil pumping pipe orifice (51), an oil filling hole (3) and an oil drain hole (4), the oil filling hole (3) and the oil drain hole (4) are both communicated with the oil pumping pipeline (2), a one-way valve (5) is arranged in cooperation with the oil filling hole (3), a nozzle (6) is arranged in cooperation with the oil drain hole (4), an oil filling valve (7) is arranged outside the one-way valve (5), an oil drain valve (8) is arranged outside the nozzle (6), the oil filling valve (7) and the oil discharging valve (8) are both fixed on the valve plate (1), the structure of the oil filling valve (7) is the same as that of the oil drain valve (8), and an oil pipe connector (9) and an air pipe hole (12) are arranged on the oil filling valve (7) and the oil drain valve (8).

2. The pneumatic three-way stop valve for the large diaphragm pump according to claim 1, wherein the oil filling valve (7) and the oil discharging valve (8) each comprise a valve body (10), a valve cover (11) is arranged by matching with the valve body (10), the air pipe hole (12) is arranged on the valve cover (11) and connected into the valve body (10), a bowl-shaped small diaphragm (13) is correspondingly arranged between the valve cover (11) and the valve body (10), a press cover (14) is arranged by matching with the bowl-shaped small diaphragm (13), the press cover (14) is connected with a valve rod (16) through a set screw (15), a first guide ring (17) and a second guide ring (18) are correspondingly arranged by penetrating through the valve rod (16) and corresponding to the valve body (10), and a large spring (19) is correspondingly arranged between the first guide ring (17) and the press cover (14), the large spring (19) is sleeved outside the valve rod (16), an inner sealing O-shaped ring (20), a sealing ring (21) and an outer sealing O-shaped ring (22) are installed on the second guide ring (18), a positioning check ring (23) is arranged at the bottom end of the second guide ring (18), an installation cavity (24) is formed by the positioning check ring (23) and the bottom end of the valve body (10), the oil pipe connector (9) is communicated into the installation cavity (24), the one-way valve (5) is arranged in the installation cavity (24) of the oil filling valve (7), the nozzle (6) is arranged in the installation cavity (24) of the oil drain valve (8), and the bottom end of the valve rod (16) extends into the installation cavity (24) and is provided with a non-metal insert (25) in a matched mode.

3. A pneumatic three-way stop valve for a large diaphragm pump according to claim 2, wherein the valve cover (11) and the valve body (10) are detachably connected through a socket head cap screw (26).

4. A pneumatic three-way stop valve for a large diaphragm pump according to claim 2, characterized in that a non-metal ring gasket (27) is further arranged between the bowl-shaped small diaphragm (13) and the valve cover (11).

5. A pneumatic three-way stop valve for a large diaphragm pump according to claim 2, wherein the upper surface of the check valve (5) is arranged in parallel with the lower surface of the non-metallic insert (25).

6. The pneumatic three-way stop valve for the large-scale diaphragm pump according to claim 1, wherein the check valve (5) comprises a check valve body (28), a check valve seat (29) and a check valve core (30), the check valve core (30) is movably arranged inside the check valve body (28) in a matching manner, a spray hole (31) connected to the check valve core (30) is arranged at the top of the check valve body (28), a blind hole (32) is arranged at the center of the check valve core (30), the check valve seat (29) is provided with a convex rod (33) which is matched and extended into the blind hole (32), an outer spigot of the check valve seat (29) corresponds to an inner spigot of the check valve body (28), a small-diameter oil discharge through hole (34) is arranged at the center of the check valve seat (29), at least one oil through hole (35) is arranged at the outer ring of the bottom of the check valve seat (29), the root of the convex rod (33) is provided with a spring positioning boss (36), a small spring (37) is detachably arranged by matching with the spring positioning boss (36), the small spring (37) is sleeved outside the one-way valve core (30), the upper part of the one-way valve core (30) corresponds to the small spring (37), and a sealing block (38) and a gasket (39) are correspondingly arranged between the small springs (37) on the upper part of the one-way valve core (30).

7. The pneumatic three-way stop valve for the large diaphragm pump according to claim 6, wherein the one-way valve body (28) is further provided with an annular groove, and a sealing O-shaped ring (40) is detachably arranged in the annular groove.

8. A pneumatic three-way stop valve for a large diaphragm pump according to claim 1, wherein the oil filling valve (7) is arranged coaxially with the check valve (5), and the oil drain valve (8) is arranged coaxially with the nozzle (6).

9. The pneumatic three-way stop valve for the large diaphragm pump according to claim 1, wherein the installation depth of the check valve (5) and the nozzle (6) exceeds the central axis of the oil pumping pipeline (2).

10. The pneumatic three-way stop valve for the large diaphragm pump according to claim 1, wherein a silencer mounting hole (41) is formed in each of the oil filling valve (7) and the oil drain valve (8), and a silencer (42) is mounted in each silencer mounting hole (41).

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