One-way valve structure of plunger pump

Abstract

The utility model belongs to the technical field of plunger pumps, in particular to a one-way valve structure of a plunger pump, which comprises a pump body, a plunger and a driving mechanism, a water inlet channel, a plunger cavity and a water outlet channel are arranged in the pump body, the plunger cavity is communicated with the water inlet channel and the water outlet channel, and the plunger is movably arranged in the plunger cavity. A water inlet one-way valve is arranged between the water inlet channel and the plunger cavity and comprises a water inlet valve body, a water inlet elastic connecting part and a water inlet plug, the diameter of the water inlet plug is larger than that of the water outlet channel, the diameter of the water inlet plug is smaller than that of the plunger cavity, and a water outlet one-way valve is arranged between the water outlet channel and the plunger cavity. The water inlet one-way valve comprises a water inlet valve body, a water outlet elastic connecting part and a plunger cavity, the water outlet one-way valve comprises a water outlet valve body, a water outlet elastic connecting part and a water outlet plug, the diameter of the water outlet plug is smaller than that of the water outlet channel, and the diameter of the water outlet plug is larger than that of the plunger cavity. And the one-way valve structure of the plunger pump does not need to be frequently maintained.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the plunger pump technical field, especially one way valve structure of plunger pump. BACKGROUND

[0002] The plunger pump is a common volumetric pump, which realizes the delivery of fluid through the reciprocating movement of the plunger in the cylinder. It mainly relies on the reciprocating movement of the plunger to change the volume of the pump cavity, thereby realizing liquid suction and liquid discharge. It is widely used in cleaning guns, petroleum and chemical industries and other fields. The check valve plays a crucial role in the plunger pump. It controls the flow direction of the liquid, prevents backflow, improves the efficiency of the pump and the safety of the system, ensures the stable operation of the pump, and prevents high-pressure liquid from flowing back during the liquid discharge process, thereby maintaining the high pressure in the pump cavity and realizing stable liquid delivery. The check valve in the plunger pump on the market is essential, and most of such check valves are composed of a spring and a steel ball. For example, Chinese patent CN107816432B. The steel ball of such check valve composed of a spring and a steel ball is prone to wear during long-term use, which leads to a decrease in the stability of the valve body and affects the normal operation of the plunger pump. Moreover, due to the poor stability of the check valve, the spring or steel ball needs to be frequently maintained and replaced, which greatly increases the maintenance cost. SUMMARY

[0003] The utility model aims at providing a simple structure, the water inlet check valve and the water outlet check valve will not appear the mutual abrasion between the components which they are composed of, ensure the stability of the water inlet check valve and the water outlet check valve, and do not need to maintain frequently or replace the plunger pump check valve structure of the check valve.

[0004] The utility model achieves the above-mentioned purpose in the following way:

[0005] The application discloses a one-way valve structure of a plunger pump, which comprises a pump body, a plunger arranged in the pump body and a driving mechanism for driving the plunger to reciprocate, wherein the pump body is provided with a water inlet channel, a plunger cavity and a water outlet channel, the plunger cavity is communicated with the water inlet channel and the water outlet channel, the plunger is movably arranged in the plunger cavity, liquid can enter the plunger cavity from the water inlet channel, at this time, the driving mechanism drives the plunger to reciprocate, so that the liquid in the plunger cavity is discharged from the water outlet channel, a water inlet one-way valve is arranged between the water inlet channel and the plunger cavity, the water inlet one-way valve comprises a water inlet valve body, a water inlet elastic connecting part arranged on the water inlet valve body and a water inlet plug connected with the water inlet elastic connecting part, the diameter of the water inlet plug is larger than that of the water outlet channel, and the diameter of the water inlet plug is smaller than that of the plunger cavity, a water outlet one-way valve is arranged between the water outlet channel and the plunger cavity, the water outlet one-way valve comprises a water outlet valve body, a water outlet elastic connecting part arranged on the water outlet valve body and a water outlet plug connected with the water outlet elastic connecting part, the diameter of the water outlet plug is smaller than that of the water outlet channel, and the diameter of the water outlet plug is larger than that of the plunger cavity.

[0006] Further, the pump body comprises a shell and a shell cover connected with the shell, the water inlet channel, the plunger cavity and the water outlet channel are arranged in the pump body, a water collecting cavity is arranged in the shell cover and communicated with the plunger cavity, a first channel is further arranged in the shell cover and communicated with the water inlet channel and the water collecting cavity, the water inlet plug is located between the first channel and the water inlet channel and has a diameter smaller than that of the first channel, a second channel is further arranged in the shell cover and communicated with the water outlet channel and the water collecting cavity, and the water outlet plug is located between the second channel and the water outlet channel and has a diameter larger than that of the second channel.

[0007] Further, a sealing ring is arranged between the shell and the shell cover, the sealing ring is located between the water collecting cavity and the plunger cavity, an installation table is arranged in the water collecting cavity, and the bottom of the sealing ring is located in the water collecting cavity and abuts against the installation table.

[0008] Further, a second valve body installation groove and a first valve body installation groove are arranged on the shell cover, the second valve body installation groove is located between the second channel and the water outlet channel, the water outlet valve body is fixedly arranged in the second valve body installation groove, the first valve body installation groove is located between the first channel and the water inlet channel, and the water inlet valve body is fixedly arranged in the first valve body installation groove.

[0009] Further, notches are arranged on the inner walls of the second valve body installation groove and the first valve body installation groove, the notches are communicated with the water collecting cavity, and the sealing ring is integrally formed with the water inlet valve body and the water outlet valve body.

[0010] Further, the pump body is provided with an inlet pipe and an outlet pipe, the inlet pipe is communicated with the inlet channel, and the outlet pipe is communicated with the outlet channel.

[0011] The utility model discloses compared with prior art outstanding and beneficial technical effect is:

[0012] The utility model belongs to the plunger pump technical field, especially point to a one -way valve structure of plunger pump, including pump body, the plunger that sets up in the plunger cavity of pump body and drive mechanism that drives plunger to carry out reciprocating motion, drive mechanism and plunger are the common mechanism of plunger pump on market, because the plunger movable setting is in the plunger cavity of pump body, and the plunger cavity is linked together with the water inlet channel, the water outlet channel in pump body, when drive mechanism control plunger moves left in the plunger cavity of pump body at this time, the pressure in plunger cavity reduces at this time, and liquid will be inhaled to the water inlet channel, because the water inlet one -way valve between water inlet channel and plunger cavity is composed of water inlet valve body, the water inlet elastic connecting portion that sets up on the water outlet valve body and the water inlet plug connected with water inlet elastic connecting portion, because the diameter of water inlet plug is less than the diameter of plunger cavity, so when liquid enters to water inlet channel, liquid will exert pressure on water inlet plug at this time, so that the water inlet elastic connecting portion connected with water inlet plug is deformed and pushes water inlet plug to plunger cavity, makes plunger cavity and water inlet channel communicate, makes liquid can enter plunger cavity smoothly, and when liquid enters to plunger cavity, water inlet plug no longer receives the thrust of liquid, the elastic connecting portion that deforms at this time will drive water inlet plug reset, because the diameter of water inlet plug is greater than the diameter of water inlet channel, so that water inlet plug reseals water inlet channel, makes plunger cavity and water inlet channel between the state of separation, liquid in plunger cavity at this time will not backflow to water inlet channel.The water outlet one-way valve between the water outlet channel and the plunger cavity is composed of a water outlet valve body, a water outlet elastic connecting part arranged on the water outlet valve body and a water outlet plug connected with the water outlet elastic connecting part, when the driving mechanism controls the plunger to move right in the plunger cavity of the pump body, at this time, the plunger will apply a pushing force to the liquid, and the liquid will apply a pressure to the water outlet plug, since the diameter of the water outlet plug is smaller than that of the water outlet channel, the water outlet elastic connecting part connected with the water outlet plug is deformed to push the water outlet plug towards the water outlet channel, finally, the water outlet channel is communicated with the plunger cavity, and the liquid can be pushed into the water outlet channel under the pushing of the plunger, when the liquid is discharged from the plunger cavity, the deformed water outlet elastic connecting part drives the water outlet plug to reset, since the diameter of the water outlet plug is larger than that of the plunger cavity, the plunger cavity is separated from the water outlet channel, so that the liquid in the water outlet channel cannot flow back into the plunger cavity, thereby ensuring that the plunger pump can stably deliver the liquid, compared with the one-way valve composed of a spring and a steel ball used in the plunger pump on the market, since the steel ball of the one-way valve is prone to wear in long-time use, the stability of the valve body is reduced, the normal work of the plunger pump is affected, and since the one-way valve has poor stability, the spring or the steel ball needs to be frequently maintained and replaced, thereby greatly increasing the maintenance cost, the water inlet one-way valve and the water outlet one-way valve are integrally formed, when workers assemble, the water inlet one-way valve is only needed to be placed between the water inlet channel and the plunger cavity, and the water outlet one-way valve is only needed to be placed between the water outlet channel and the plunger cavity, so that workers can conveniently assemble, the assembly efficiency is increased, and the components of the water inlet one-way valve and the water outlet one-way valve will not be worn, thereby ensuring the stability of the water inlet one-way valve and the water outlet one-way valve, so that the plunger pump can stably deliver the liquid, and users do not need to frequently maintain or replace the one-way valve, thereby greatly reducing the maintenance cost. BRIEF DESCRIPTION OF DRAWINGS

[0013] Figure 1 is a perspective view of the utility model.

[0014] Figure 2 is an explosion view of the shell and the shell cover.

[0015] Figure 3 is an explosion view of the shell, the plunger, the water outlet one-way valve, the water inlet one-way valve and the sealing ring.

[0016] Figure 4 is a sectional view of the utility model Figure 1 .

[0017] Figure 5 is a sectional view of the utility model Figure 2 .

[0018] Figure 6 is a sectional view of the shell and the shell cover.

[0019] Figure 7 is the sectional view of the utility model Figure 3 .

[0020] Figure 8 is the sectional view of the utility model Figure 4 .

[0021] Figure 9 is the structural diagram of the shell cover of the utility model.

[0022] Figure 10 is the exploded view of the shell cover, water outlet one-way valve, water inlet one-way valve and sealing ring of the utility model.

[0023] Figure 11 is the sectional view of the water collecting cavity and the first channel and the second channel of the utility model.

[0024] Figure 12 is the perspective view of the water outlet one-way valve, water inlet one-way valve and sealing ring of the utility model.

[0025] Meaning represented by the reference signs in the drawing:

[0026] 1-pump body;2-plunger;3-water inlet channel;4-plunger cavity;

[0027] 6-water inlet one-way valve;7-water inlet valve body;8-water inlet elastic connecting part;9-water inlet plug;

[0028] 10-water outlet one-way valve;11-water outlet valve body;12-water outlet elastic connecting part;13-water outlet plug;

[0029] 14-shell;15-shell cover;16-water collecting cavity;17-first channel;18-second channel;

[0030] 19-sealing ring;20-mounting table;21-second valve body mounting groove;22-first valve body mounting groove;

[0031] 23-notch;24-water inlet pipe;25-water outlet pipe. DETAILED DESCRIPTION

[0032] The utility model will be further described in combination with specific embodiments:

[0033] The utility model belongs to the plunger pump technical field, especially one way valve structure of plunger pump, including pump body 1, the plunger 2 of setting in pump body 1 and the drive mechanism of driving plunger 2 to carry out reciprocating motion, drive mechanism and plunger 2 are the mechanism of a kind of commonly seen on plunger pump on market, since plunger 2 movably set in plunger cavity 4 of pump body 1, and plunger cavity 4 is connected with water inlet channel 3, water outlet channel 5 in pump body 1, when drive mechanism controls plunger 2 in plunger cavity 4 of pump body 1 moves left at this time, the pressure in plunger cavity 4 reduces at this time, liquid will be inhaled to water inlet channel 3, since the water inlet one-way valve 6 between water inlet channel 3 and plunger cavity 4 is composed of water inlet valve body 7, water inlet elastic connecting portion 8 being arranged on water outlet valve body 11 and water inlet plug 9 being connected with water inlet elastic connecting portion 8, since the diameter of water inlet plug 9 is less than the diameter of plunger cavity 4, so when liquid enters water inlet channel 3, liquid will exert pressure on water inlet plug 9 at this time, so that water inlet elastic connecting portion 8 being connected with water inlet plug 9 is deformed and pushes water inlet plug 9 towards plunger cavity 4, so that plunger cavity 4 is connected with water inlet channel 3, so that liquid can enter plunger cavity 4 smoothly, and when liquid enters plunger cavity 4, water inlet plug 9 is no longer subjected to the thrust of liquid, the deformed elastic connecting portion drives water inlet plug 9 to reset at this time, since the diameter of water inlet plug 9 is greater than the diameter of water inlet channel 3, so that water inlet plug 9 reseals water inlet channel 3, so that plunger cavity 4 and water inlet channel 3 are in separate state, so that liquid in plunger cavity 4 will not backflow into water inlet channel 3 at this time.When the driving mechanism controls the plunger 2 to move right in the plunger cavity 4 of the pump body 1, at this time, the plunger 2 will apply a pushing force to the liquid, and the liquid will apply a pressure to the water outlet plug 13. Since the diameter of the water outlet plug 13 is smaller than the diameter of the water outlet channel 5, the water outlet elastic connecting part 12 connected with the water outlet plug 13 will be deformed to push the water outlet plug 13 towards the water outlet channel 5, so that the water outlet channel 5 is communicated with the plunger cavity 4, and the liquid can be pushed into the water outlet channel 5 under the pushing of the plunger 2. When the liquid is discharged from the plunger cavity 4, the deformed water outlet elastic connecting part 12 will drive the water outlet plug 13 to reset. Since the diameter of the water outlet plug 13 is larger than the diameter of the plunger cavity 4, the plunger cavity 4 is separated from the water outlet channel 5, so that the liquid in the water outlet channel 5 cannot flow back into the plunger cavity 4, thereby ensuring that the plunger pump can stably deliver the liquid. Compared with the one-way valve composed of a spring and a steel ball used in the plunger pump on the market, the steel ball is easy to wear in a long time of use, which leads to a decrease in stability of the valve body and affects the normal work of the plunger pump. Moreover, due to the poor stability of the one-way valve, the spring or the steel ball needs to be frequently maintained and replaced, which greatly increases the maintenance cost. The water inlet one-way valve 6 and the water outlet one-way valve 10 are integrally formed, so that the worker only needs to place the water inlet one-way valve 6 between the water inlet channel 3 and the plunger cavity 4 and place the water outlet one-way valve 10 between the water outlet channel 5 and the plunger cavity 4 during assembly, which is convenient for the worker to assemble and increases the assembly efficiency. Moreover, the components of the water inlet one-way valve 6 and the water outlet one-way valve 10 will not be worn out, thereby ensuring the stability of the water inlet one-way valve 6 and the water outlet one-way valve 10, so that the plunger pump can stably deliver the liquid, and the user does not need to frequently maintain or replace the one-way valve, thereby greatly reducing the maintenance cost.

[0034] Preferably, the pump body 1 comprises a shell 14 and a shell cover 15 connected with the shell 14, the water inlet channel 3, the plunger cavity 4 and the water outlet channel 5 are arranged in the pump body 1, the shell cover 15 is provided with a water collecting cavity 16, the water collecting cavity 16 is communicated with the plunger cavity 4, the shell cover 15 is further provided with a first channel 17, the first channel 17 is communicated with the water inlet channel 3 and the water collecting cavity 16, the water inlet plug 9 is located between the first channel 17 and the water inlet channel 3, the diameter of the water inlet plug 9 is smaller than that of the first channel 17, the shell cover 15 is further provided with a second channel 18, the second channel 18 is communicated with the water outlet channel 5 and the water collecting cavity 16, the water outlet plug 13 is located between the second channel 18 and the water outlet channel 5, the diameter of the water outlet plug 13 is larger than that of the second channel 18; the pump body 1 is composed of the shell 14 and the shell cover 15, the water collecting cavity 16 in the shell cover 15 is communicated with the plunger cavity 4 on the shell 14, the first channel 17 in the shell cover 15 is communicated with the water inlet channel 3 and the water collecting cavity 16 on the shell 14, the water inlet plug 9 is located between the first channel 17 and the water inlet channel 3, and the diameter of the water inlet plug 9 is smaller than that of the first channel 17, when the liquid is sucked into the water inlet channel 3, the liquid will exert pressure on the water inlet plug 9, so that the water inlet plug 9 moves towards the first channel 17 through the water inlet elastic connecting part 8, so that the first channel 17, the water inlet channel 3, the water collecting cavity 16 and the plunger cavity 4 are communicated, and finally the liquid will pass through the water inlet channel 3, the first channel 17 and the water collecting cavity 16 into the plunger cavity 4, since the second channel 18 in the shell cover 15 is communicated with the water outlet channel 5 and the water collecting cavity 16, and the water outlet plug 13 is located between the second channel 18 and the water outlet channel 5, when the plunger 2 pushes and extrudes the liquid, the liquid in the plunger cavity 4 will reach the second channel 18 through the water collecting cavity 16, at this time the liquid will exert pressure on the water outlet plug 13, the water outlet plug 13 will move towards the water outlet channel 5 through the water outlet elastic connecting part 12, so that the water outlet channel 5 is communicated with the second channel 18, when the liquid in the second channel 18 enters the water outlet channel 5, since the diameter of the water outlet plug 13 is larger than that of the second channel 18, at this time the water outlet plug 13 will reset to the initial position through the water outlet elastic connecting part 12, so as to separate the second channel 18 from the water outlet channel 5, so that the liquid in the water outlet channel 5 cannot flow back to the second channel 18, so as to ensure that the plunger pump can stably transport the liquid.

[0035] Preferably, a sealing ring 19 is arranged between the shell 14 and the shell cover 15, the sealing ring 19 is located between the water collecting cavity 16 and the plunger cavity 4, the inside of the water collecting cavity 16 is provided with a mounting table 20, and the bottom of the sealing ring 19 is located in the water collecting cavity 16 and abuts against the mounting table 20. Since the water collecting cavity 16 in the shell cover 15 is communicated with the plunger cavity 4 in the shell 14, and the sealing ring 19 between the shell 14 and the shell cover 15 is located between the water collecting cavity 16 and the plunger cavity 4, the sealing property between the shell 14 and the shell cover 15 is ensured, the liquid in the water collecting cavity 16 and the plunger cavity 4 cannot flow out from the gap between the shell 14 and the shell cover 15, and the normal use of the plunger pump is affected, and the bottom of the sealing ring 19 is located in the water collecting cavity 16 and abuts against the mounting table 20 in the water collecting cavity 16, so that the sealing ring 19 cannot move randomly between the shell 14 and the shell cover 15, and the sealing property of the shell 14 and the shell cover 15 is ensured.

[0036] Preferably, the shell cover 15 is provided with a second valve body mounting groove 21 and a first valve body mounting groove 22, the second valve body mounting groove 21 is located between the second channel 18 and the water outlet channel 5, the water outlet valve body 11 is fixedly arranged in the second valve body mounting groove 21, the first valve body mounting groove 22 is located between the first channel 17 and the water inlet channel 3, and the water inlet valve body 7 is fixedly arranged in the first valve body mounting groove 22. The second valve body mounting groove 21 and the first valve body mounting groove 22 on the shell cover 15 are respectively used for mounting the water outlet valve body 11 and the water inlet valve body 7, and the second valve body mounting groove 21 is located between the second channel 18 and the water outlet channel 5, so that when the water outlet valve body 11 is mounted into the second valve body mounting groove 21, the water outlet plug 13 on the water outlet valve body 11 is just located between the second channel 18 and the water outlet channel 5, and when the water inlet valve body 7 is mounted into the first valve body mounting groove 22, the water inlet plug 9 on the water inlet valve body 7 is just located between the first channel 17 and the water inlet channel 3, so that the water outlet check valve 10 and the water inlet check valve can limit the backflow of liquid, and the arrangement of the first valve body mounting groove 22 and the second valve body mounting groove 21 can effectively limit the random movement of the water outlet valve body 11 and the water inlet valve body 7, so that the water inlet plug 9 can be located between the first channel 17 and the water inlet channel 3, and the water outlet plug 13 can be located between the second channel 18 and the water outlet channel 5.

[0037] Preferably, the inner wall of the second valve body mounting groove 21 and the first valve body mounting groove 22 is provided with a notch 23, the notch 23 is communicated with the water collecting cavity 16, the sealing ring 19 is integrally formed with the water inlet valve body 7 and the water outlet valve body 11; since the sealing ring 19 is integrally formed with the water inlet valve body 7 and the water outlet valve body 11, when the workers assemble the shell cover 15 and the shell 14 together, the workers can install the sealing ring 19, the water inlet valve body 7 and the water outlet valve body 11 into the water collecting cavity 16, the first valve body mounting groove 22 and the second valve body mounting groove 21 respectively, so that the workers can conveniently assemble the plunger pump.

[0038] Preferably, the pump body 1 is provided with a water inlet pipe 24 and a water outlet pipe 25, the water inlet pipe 24 is communicated with the water inlet channel 3, and the water outlet pipe 25 is communicated with the water outlet channel 5; the water inlet pipe 24 and the water outlet pipe 25 can be externally connected with water conveying pipes, so that the practicability of the plunger pump is improved.

[0039] The above embodiment is only a preferred embodiment of the present application, and does not limit the protection scope of the present application, so that: equivalent changes made according to the structure, shape and principle of the present application should be covered in the protection scope of the present application.

Claims

1. A one-way valve structure for a plunger pump, comprising a pump body (1), a plunger (2) disposed within the pump body (1), and a drive mechanism for driving the plunger (2) to reciprocate, characterized in that: The pump body (1) is provided with a water inlet channel (3), a plunger cavity (4) and a water outlet channel (5), the plunger cavity (4) is communicated with the water inlet channel (3) and the water outlet channel (5), the plunger (2) is movably arranged in the plunger cavity (4), liquid can enter the plunger cavity (4) from the water inlet channel (3), at this time the driving mechanism drives the plunger (2) to reciprocate, thereby discharging the liquid in the plunger cavity (4) from the water outlet channel (5), the water inlet channel (3) and the plunger cavity (4) are provided with a water inlet check valve (6), the water inlet check valve (6) comprises a water inlet valve body (7), a water inlet elastic connecting part (8) arranged on the water inlet valve body (7) and a water inlet plug (9) connected with the water inlet elastic connecting part (8), the diameter of the water inlet plug (9) is greater than the diameter of the water outlet channel (5), the diameter of the water inlet plug (9) is smaller than the diameter of the plunger cavity (4), the water outlet channel (5) and the plunger cavity (4) are provided with a water outlet check valve (10), the water outlet check valve (10) comprises a water outlet valve body (11), a water outlet elastic connecting part (12) arranged on the water outlet valve body (11) and a water outlet plug (13) connected with the water outlet elastic connecting part (12), the diameter of the water outlet plug (13) is smaller than the diameter of the water outlet channel (5), the diameter of the water outlet plug (13) is greater than the diameter of the plunger cavity (4).

2. The one-way valve structure of a plunger pump according to claim 1, characterized by: The pump body (1) comprises a shell (14) and a shell cover (15) connected with the shell (14), the water inlet channel (3), the plunger cavity (4) and the water outlet channel (5) are arranged in the pump body (1), the shell cover (15) is provided with a water collecting cavity (16), the water collecting cavity (16) is communicated with the plunger cavity (4), the shell cover (15) is further provided with a first channel (17), the first channel (17) is communicated with the water inlet channel (3) and the water collecting cavity (16), the water inlet plug (9) is located between the first channel (17) and the water inlet channel (3), the diameter of the water inlet plug (9) is smaller than the diameter of the first channel (17), the shell cover (15) is further provided with a second channel (18), the second channel (18) is communicated with the water outlet channel (5) and the water collecting cavity (16), the water outlet plug (13) is located between the second channel (18) and the water outlet channel (5), the diameter of the water outlet plug (13) is greater than the diameter of the second channel (18).

3. The one-way valve structure of a plunger pump according to claim 2, characterized in that: The shell (14) and the shell cover (15) are provided with a sealing ring (19), the sealing ring (19) is located between the water collecting cavity (16) and the plunger cavity (4), the inside of the water collecting cavity (16) is provided with a mounting table (20), the bottom of the sealing ring (19) is located in the water collecting cavity (16) and abuts against the mounting table (20).

4. The one-way valve structure of a plunger pump according to claim 3, characterized by: The shell cover (15) is provided with a second valve body mounting groove (21) and a first valve body mounting groove (22), the second valve body mounting groove (21) is located between the second channel (18) and the water outlet channel (5), the water outlet valve body (11) is fixedly arranged in the second valve body mounting groove (21), the first valve body mounting groove (22) is located between the first channel (17) and the water inlet channel (3), and the water inlet valve body (7) is fixedly arranged in the first valve body mounting groove (22).

5. The one-way valve structure of a plunger pump according to claim 4, characterized by: The inner walls of the second valve body mounting groove (21) and the first valve body mounting groove (22) are provided with notches (23), the notches (23) are communicated with the water collecting cavity (16), and the sealing ring (19) is integrally formed with the water inlet valve body (7) and the water outlet valve body (11).

6. The one-way valve structure of a plunger pump according to claim 1, characterized by: The pump body (1) is provided with a water inlet pipe (24) and a water outlet pipe (25), the water inlet pipe (24) is communicated with the water inlet channel (3), and the water outlet pipe (25) is communicated with the water outlet channel (5).

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