CN114738265A - A high-pressure pump inlet check valve - Google Patents

Abstract

The invention belongs to the technical field of one-way valves, in particular to a liquid inlet check valve of a high-pressure pump, comprising a check valve body, a liquid inlet end, a filter mechanism, a liquid outlet end and a control and alarm device. It is detachably installed inside the liquid inlet to filter the oil entering the liquid inlet. The control and alarm device is used to automatically alarm when the flow detection device detects that the oil flow is lower than the limit value. By adding a filter mechanism to the existing one-way valve structure, the present invention can filter the oil in the liquid inlet end, adopts a detachable connection method, is easy to assemble, and can filter the filter without disassembling the whole valve device. For cleaning or replacement, by setting a flow detection device on the liquid outlet, the flow of oil can be monitored in real time to find out the blockage problem in the valve in time, and a flow monitoring system is formed with the control and alarm device. When the oil flow is detected to be lower than the limit value Automatic alarm when.

Description

A high-pressure pump inlet check valve

technical field

The invention relates to the technical field of one-way valves, in particular to a one-way valve for liquid inlet of a high-pressure pump.

Background technique

The one-way valve is that the fluid can only flow along the water inlet, but the medium at the water outlet cannot flow back, commonly known as a one-way valve. One-way valve is also called check valve or check valve. Used in hydraulic systems to prevent reverse flow of oil flow, or used in pneumatic systems to prevent reverse flow of compressed air. There are two types of check valves: straight-through and right-angle. The straight-through check valve is installed on the pipeline with a threaded connection. Right-angle check valves are available in three forms: threaded connection, plate connection and flange connection.

A one-way valve generally includes a valve body, a valve core and a spring, and the spring provides a fixed opening pressure. Although the existing high-pressure pump inlet check valve can prevent backflow, it has a single function and lacks an oil filter mechanism. The normal operation of the valve can even lead to the failure of the subsequent equipment, and the corresponding lack of flow monitoring function can not detect the blockage in the valve body in time.

SUMMARY OF THE INVENTION

(1) Technical problems solved

Aiming at the deficiencies of the prior art, the present invention provides a high-pressure pump liquid inlet check valve, which solves the problem that the existing high-pressure pump liquid inlet check valve proposed in the above-mentioned background art lacks an oil filter mechanism, and cannot provide an oil filter mechanism for the inlet valve. The polluted oil in the body is filtered, which can easily lead to the blockage of the valve core, which affects the normal operation of the system, and even leads to the failure of the subsequent equipment. The corresponding lack of flow monitoring function, the blockage problem in the valve body cannot be found in time.

(2) Technical solutions

The present invention specifically adopts the following technical solutions in order to achieve the above object:

A liquid inlet check valve for a high-pressure pump, comprising:

The one-way valve body is provided with a fluid channel inside, and a valve core is installed on the corresponding fluid channel in the one-way valve body through a spring, and the valve core is provided with a liquid outlet valve port, and the spring is used to provide a fixed The opening pressure of the outlet valve;

The liquid inlet end is connected to the front end of the one-way valve body, the liquid inlet end is provided with an installation groove, the bottom of the liquid inlet end corresponding to the installation groove is provided with an embedded groove, and the inner channel of the liquid inlet end runs through the embedded groove communicate with the liquid inlet of the fluid channel;

The filter mechanism, which is sealed and can be detachably installed inside the liquid inlet end, is used to filter the oil entering the liquid inlet end;

The liquid outlet end is connected to the rear end of the one-way valve body, the liquid outlet end is embedded with a flow detection device for monitoring the oil flow, and the liquid inlet port of the liquid outlet end communicates with the liquid outlet port of the fluid channel;

The control and alarm device is used for automatic alarm when the flow detection device detects that the oil flow is lower than the limit value.

Further, the one-way valve body includes an inlet valve body and an outlet valve body, the inlet valve body and the outlet valve body are threadedly connected, a first sealing ring is arranged in the one-way valve body, and the first sealing ring is provided in the one-way valve body. The ring is installed on the inner wall of the connecting end corresponding to the inlet valve body and the outlet valve body in the fluid passage. When the inlet valve body, the outlet valve body and the valve core are in contact with the first sealing ring at the same time, the first sealing ring provides anti-backflow. seal.

Further, the liquid inlet end and the liquid outlet end are provided with external connection threads for the installation of the ferrule and the nut, and the liquid inlet port of the liquid inlet end and the liquid outlet port of the liquid outlet end are both set to be in phase with the ferrule. Fitted opening.

Further, the filter mechanism includes a mounting seat adapted to the mounting groove, the mounting seat is fixedly installed in the mounting groove by bolts, and the bottom of the mounting seat is installed with a connecting piece adapted to the embedded groove, so An installation hole is arranged inside the connecting piece, and a filter screen is installed in the installation hole, and the filter screen is correspondingly installed on the center line of the inner channel of the liquid inlet end.

Specifically, the connection between the mounting seat and the connecting piece is sealedly connected with the notch of the embedded groove through the sealing strip, and the left and right sides of the connecting piece are provided with second sealing rings corresponding to the peripheral positions of the mounting holes. The connecting piece is sealed and connected with the groove wall of the embedded groove through the second sealing ring.

Further, the installation groove is provided with a gland for pressing the filter mechanism, the left and right sides of the liquid inlet end corresponding to the installation groove are provided with buckle seats, and the left and right side edges of the pressure cover are provided with buckles. Seat snap-fit tabs.

Further, the control and alarm device includes a PLC controller and an alarm device, and the PLC controller is electrically connected to the alarm device and the flow detection device respectively. When the flow detection device detects that the oil flow is lower than the limit value, the The PLC controller controls the alarm to alarm.

(3) Beneficial effects

Compared with the prior art, the present invention provides a high-pressure pump liquid inlet check valve, which has the following beneficial effects:

1. In the present invention, by adding a filter mechanism to the existing one-way valve structure, the oil in the liquid inlet end can be filtered, and the detachable connection method is adopted, which is easy to assemble and can be assembled without disassembling the whole valve device. Cleaning or replacing the filter screen can effectively improve the maintenance efficiency, and the overall structure is compact.

2. In the present invention, by setting the flow detection device on the liquid outlet, the flow of oil can be monitored in real time, and the blockage problem in the valve can be detected in time, and the flow monitoring system can be formed in cooperation with the control and alarm device. Automatic alarm will occur.

3. In the present invention, by arranging a gland on the installation groove of the liquid inlet, and pressing the mounting seat of the filter mechanism by the gland, the pipeline vibration caused by the instantaneous fluctuation of the lifting pressure of the high-pressure pump can be effectively prevented, which may be caused during long-term use. The problem of bolts falling off makes the overall valve structure more stable and reliable.

Description of drawings

Fig. 1 is the overall structure schematic diagram of the present invention;

Fig. 2 is the connection schematic diagram of the liquid inlet end and the filter mechanism in the cross-sectional state of the present invention;

3 is a cross-sectional view of a liquid inlet end in the present invention;

Fig. 4 is the structural representation of filtering mechanism in the present invention;

FIG. 5 is a schematic structural diagram of a press cover in the present invention.

In the figure: 1, one-way valve body; 101, inlet valve body; 102, outlet valve body; 2, liquid inlet end; 201, installation groove; 202, embedded groove; 203, buckle seat; 3, filter mechanism; 301 , mounting seat; 302, bolt; 303, connecting piece; 304, filter screen; 4, liquid outlet; 5, fluid channel; 6, spring; 7, valve core; 8, flow detection device; 9, first sealing ring ; 10, sealing strip; 11, the second sealing ring; 12, gland; 1201, buckle tongue.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

Example

As shown in Figures 1-5, a high-pressure pump liquid inlet check valve proposed by an embodiment of the present invention includes a check valve body 1, a liquid inlet end 2, a filter mechanism 3, a liquid outlet end 4, and a control and alarm device, where:

One-way valve body 1, the main body is a one-way valve structure in the prior art, and a fluid channel 5 is provided inside it. Specifically, the one-way valve body 1 is provided with a valve connected in series between the front and rear channels of the fluid channel 5. The valve core 7 is installed in the valve cavity through the spring 6. The valve core 7 is arranged with a plurality of liquid inlet holes on the outer wall, the inner wall is hollow, and the tail end is provided with a liquid outlet valve structure. The structure of the valve core 7 The design can reduce the flow resistance and ensure the flow, in which the spring 6 provides a fixed opening pressure of the liquid outlet valve; during operation, the pipeline system increases the input pressure under the action of the high-pressure pump, and forces the valve core 7 away from the action of the fluid. The front-end channel of the fluid channel 5, the fluid is discharged sequentially through the gap between the valve core 7 and the one-way valve body 1, the liquid inlet hole and the liquid outlet valve port of the valve core 7, when the fluid flows in the reverse direction, the valve core 7 is in the spring 6. Under the action of blocking the front end channel of the fluid channel 5, it plays the role of preventing backflow.

The liquid inlet end 2 is connected to the front end of the one-way valve body 1, the liquid inlet end 2 is provided with an installation groove 201, the bottom of the liquid inlet end 2 corresponding to the installation groove 201 is provided with an embedded groove 202, and the inner channel of the liquid inlet end 2 The penetration groove 202 communicates with the liquid inlet of the fluid channel 5; the positions of the installation groove 201 and the embedded groove 202 relative to the liquid inlet end 2 are shown in Figure 3;

The filter mechanism 3 is detachably installed inside the liquid inlet end 2, and is sealed with a sealing ring to prevent leakage. The function of the filter mechanism 3 is to filter the oil entering the liquid inlet end 2 to avoid the accumulation of impurities. The valve body 1 of the one-way valve is blocked, and the detachable connection method has the characteristics that the one-way valve does not need to be disassembled as a whole to clean or replace the filter screen, which can improve the efficiency of filter screen cleaning and replacement.

The liquid outlet 4 is connected to the rear end of the one-way valve body 1. The liquid outlet 4 is embedded with a flow detection device 8 for monitoring the oil flow. The liquid inlet of the liquid outlet 4 and the liquid outlet of the fluid channel 5 are embedded. The port is connected, and the flow detection device 8 can monitor the flow of oil in real time, and can find out the blockage problem in the valve body 1 of the check valve in time.

In the above-mentioned embodiment, the flow detection device 8 may adopt one of the LXZ series magnetoelectric smart flowmeters in the prior art.

The control and alarm device is used to automatically alarm when the flow detection device 8 detects that the oil flow is lower than the limit value.

As shown in FIG. 1 , in some embodiments, the one-way valve body 1 includes an inlet valve body 101 and an outlet valve body 102 , the inlet valve body 101 is screwed with the outlet valve body 102 , and the inlet valve body 101 is connected with the outlet valve body 102 The connection method of threaded connection can facilitate the replacement of damaged valve core 7 and spring 6; the check valve body 1 is provided with a first sealing ring 9, and the first sealing ring 9 is installed in the fluid channel 5 corresponding to the inlet valve body 101 On the inner wall of the connecting end with the outlet valve body 102, when the inlet valve body 101, the outlet valve body 102 and the valve core 7 are in contact with the first sealing ring 9 at the same time, the first sealing ring 9 provides a backflow prevention seal, and the check valve works normally. In this state, the valve core 7 will exert a certain force on the spring 6 under the pressure of the oil, and the compression spring 6 drives the valve core 7 to move backward. At this time, the oil enters the valve through the space between the valve core 7 and the inner wall of the outlet valve body 102 inside the core 7, and then discharged through the liquid outlet valve port.

As shown in FIG. 1 , in some embodiments, the liquid inlet end 2 and the liquid outlet end 4 are provided with external connection threads for installing the ferrule and the nut, and the liquid inlet and outlet end 4 of the liquid inlet end 2 are provided with external connection threads. The liquid outlet of the ferrule is set to be open to match the ferrule. When assembling, place the ferrule at the position of the liquid inlet of the liquid inlet end 2 inside the nut, and then turn the nut to insert the ferrule into the opening. In the mouth, the installation of the nut and the ferrule on the liquid inlet end 2 is completed. The installation method of the ferrule and the nut on the liquid outlet end 4 is the same as that of the liquid inlet end 2; when connecting the pipeline, insert the end of the connecting pipe into the ferrule Inside, the nut is used to lock it against the ferrule to form a seal, no welding is required, and it is easy to install.

As shown in FIG. 4 , in some embodiments, the filter mechanism 3 includes a mounting seat 301 that is adapted to the mounting groove 201 , the mounting seat 301 is fixedly installed in the mounting groove 201 by means of bolts 302 , and the bottom of the mounting seat 301 is mounted with a For the connecting piece 303 that fits into the embedded groove 202, the end face size of the mounting seat 301 should be larger than that of the connecting piece 303. When installing, align the connecting piece 303 with the embedded groove 202, and overlap the mounting seat 301 in the mounting groove 201. Yes; there is a mounting hole inside the connecting piece 303, a filter screen 304 is installed in the mounting hole, the filter screen 304 is correspondingly installed on the center line of the inner channel of the liquid inlet 2, and the size of the filter screen 304 is relative to the inner channel of the liquid inlet end 2. It should not be too small, so as to avoid causing the inner edge of the connecting piece 303 protruding into the channel to block the flow of oil.

As shown in FIG. 2 , in some embodiments, in order to improve the sealing performance of the filter mechanism 3 , the connection between the mounting seat 301 and the connecting piece 303 is sealed through the sealing strip 10 and the notch of the embedded groove 202 . A second sealing ring 11 is provided on the left and right sides of the connecting piece 303 corresponding to the peripheral positions of the installation holes. The connecting piece 303 is sealedly connected to the groove wall of the embedded groove 202 through the second sealing ring 11, and the double sealing prevents oil leakage and ensures the connection structure. water tightness.

As shown in FIG. 2 and FIG. 5 , in some embodiments, in order to prevent the pipeline from vibrating due to the instantaneous large fluctuation of the lifting pressure of the high-pressure pump, the bolts 302 may fall off during long-term use. The installation groove 201 is provided with a gland 12 for pressing the filter mechanism 3. The installation of the gland 12 makes the connection between the installation seat 301, the connecting piece 303 and the liquid inlet 2 more tightly, effectively preventing the bolt 302 from falling off, so that the The filter mechanism 3 can work stably and reliably for a long time; the left and right sides of the liquid inlet end 2 corresponding to the installation groove 201 are provided with buckle seats 203 , and the left and right side edges of the gland 12 are provided with buckle tongues 1201 that are engaged with the buckle seats 203 , through the cooperation of the buckle seat 203 and the buckle tongue 1201 , the pressure cover 12 can be quickly buckled on the installation groove 201 , and the pressure cover 12 can play the role of waterproofing and preventing impurities from entering the installation groove 201 .

In some embodiments, the control and alarm device includes a PLC controller and an alarm device. The PLC controller is electrically connected to the alarm device and the flow detection device 8 respectively. When the flow detection device 8 detects that the oil flow rate is lower than the limit value, The PLC controller controls the alarm to alarm.

Finally, it should be noted that the above are only preferred embodiments of the present invention, and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, for those skilled in the art, the The technical solutions described in the foregoing embodiments may be modified, or some technical features thereof may be equivalently replaced. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims (7)

1. The liquid inlet one-way valve of the high-pressure pump is characterized in that: the method comprises the following steps:

the check valve comprises a check valve body (1), a fluid channel (5) is arranged in the check valve body (1), a valve core (7) is arranged on the corresponding fluid channel (5) in the check valve body (1) through a spring (6), a liquid outlet valve port is arranged on the valve core (7), and the spring (6) is used for providing fixed liquid outlet valve port opening pressure;

the liquid inlet end (2) is connected to the front end of the one-way valve body (1), a mounting groove (201) is formed in the liquid inlet end (2), an embedded groove (202) is formed in the liquid inlet end (2) and corresponds to the bottom of the mounting groove (201), and an inner channel of the liquid inlet end (2) penetrates through the embedded groove (202) and is communicated with a liquid inlet of the fluid channel (5);

the filtering mechanism (3) is hermetically and detachably arranged in the liquid inlet end (2) and is used for filtering the oil liquid entering the liquid inlet end (2);

the liquid outlet end (4) is connected to the rear end of the one-way valve body (1), a flow detection device (8) for monitoring the flow of oil is embedded in the liquid outlet end (4), and a liquid inlet of the liquid outlet end (4) is communicated with a liquid outlet of the fluid channel (5);

and the control and alarm device is used for automatically giving an alarm when the flow detection device (8) detects that the oil flow is lower than the limit value.

2. The high-pressure pump feed check valve as claimed in claim 1, wherein: the check valve body (1) comprises an inlet valve body (101) and an outlet valve body (102), the inlet valve body (101) is in threaded connection with the outlet valve body (102), a first sealing ring (9) is arranged in the check valve body (1), the first sealing ring (9) is arranged on the inner wall of the connecting end, corresponding to the inlet valve body (101) and the outlet valve body (102), of the fluid channel (5), and when the inlet valve body (101), the outlet valve body (102) and the valve core (7) are in contact with the first sealing ring (9) simultaneously, the first sealing ring (9) provides backflow prevention sealing.

3. The high-pressure pump feed check valve as claimed in claim 1, wherein: outer connecting threads used for installing the clamping sleeve and the screw cap are arranged on the liquid inlet end (2) and the liquid outlet end (4), and the liquid inlet of the liquid inlet end (2) and the liquid outlet of the liquid outlet end (4) are both arranged in an open shape matched with the clamping sleeve.

4. The high-pressure pump feed check valve as claimed in claim 1, wherein: filtering mechanism (3) include mount pad (301) with mounting groove (201) looks adaptation, mount pad (301) are through bolt (302) fixed mounting in mounting groove (201), connection piece (303) with embedded groove (202) looks adaptation are installed to the bottom of mount pad (301), the inside of connection piece (303) is equipped with the mounting hole, install filter screen (304) in the mounting hole, filter screen (304) correspond to be installed on the central line of passageway in feed liquor end (2).

5. The high-pressure pump feed check valve as claimed in claim 4, wherein: sealing connection between the junction of mount pad (301) and connection piece (303) passes through sealing strip (10) and the notch of embedded groove (202), the peripheral position that the left and right sides of connection piece (303) corresponds the mounting hole all is equipped with second sealing washer (11), connection piece (303) are through second sealing washer (11) and embedded groove (202) cell wall sealing connection.

6. The high-pressure pump feed check valve of claim 1, characterized in that: be equipped with gland (12) that are used for sticising filter mechanism (3) on mounting groove (201), the left and right sides that corresponds mounting groove (201) on feed liquor end (2) is equipped with detains seat (203), lateral margin department is equipped with and detains seat (203) lock joint complex knot tongue (1201) about gland (12).

7. The high-pressure pump feed check valve as claimed in claim 1, wherein: control and alarm device include PLC controller and alarm, the PLC controller respectively with alarm and flow detection device (8) electric connection, when flow detection device (8) detected that fluid flow is less than the limit value, the PLC controller control alarm reports to the police.

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