Plunger pump with high-pressure runner and low-pressure runner switching function

Abstract

The utility model provides a plunger pump with high and low pressure flow channel switching, which comprises a pump body, the pump body is provided with a water outlet channel, a one-way valve assembly is arranged in the water outlet channel, and the right end of the one-way valve assembly is provided with a spray head; a venturi pipe joint is installed at an outlet of the water outlet channel, and the water outlet channel is divided into a left cavity and a right cavity through the one-way valve assembly. The pump body is further provided with a mounting channel, a first channel used for communicating the mounting channel with the left cavity and a second channel used for communicating the mounting channel with the right cavity. And a switching assembly is arranged in the mounting channel and is configured to be used for communicating or cutting off the first channel and the second channel in response to the water pressure difference between the left cavity and the right cavity. According to the utility model, flow channel switching can be carried out during liquid absorption and high-pressure operation.

Description

TECHNICAL FIELD

[0001] The utility model relates to high pressure cleaning machine accessories, in particular, relate to a kind of plunger pump with high-low pressure flow passage switching. BACKGROUND

[0002] In order to remove stains more efficiently when using pressure washer, it is often necessary to mix cleaning fluid for operation. The current practice in the industry is to install a venturi tube at the outlet of the high-pressure water pump of the cleaning machine to achieve the function of automatically sucking cleaning fluid by the cleaning machine. Since the venturi tube needs a large liquid flow rate to form a vacuum, a spray head needs to be installed before the venturi tube to form high-speed fluid. When the cleaning machine does not need to suck cleaning fluid, the outlet pipeline will form a large resistance due to the presence of the built-in spray head, i.e. the pressure loss of the outlet pipeline increases, affecting the final cleaning effect of the cleaning machine. SUMMARY

[0003] Therefore, the utility model aims to provide a plunger pump with high-low pressure flow passage switching, which has the characteristics of reasonable structure design.

[0004] To achieve the above-mentioned purpose, the technical scheme of the utility model is:

[0005] A plunger pump with high-low pressure flow passage switching, comprising a pump body, the pump body has a water outlet channel, a one-way valve assembly is installed in the water outlet channel, the right end of the one-way valve assembly has a spray head; a venturi tube connector is installed at the outlet of the water outlet channel, the one-way valve assembly separates the water outlet channel into a left chamber and a right chamber; the pump body is also provided with a mounting channel, a first channel for connecting the mounting channel with the left chamber, and a second channel for connecting the mounting channel with the right chamber;

[0006] The mounting channel is provided with a switching assembly, which is configured to select to connect or cut off the first channel and the second channel in response to the water pressure difference between the first channel and the second channel.

[0007] Preferably, the one-way valve assembly comprises a first valve seat, a cone valve body, a second spring and the spray head; the first valve seat is fixedly arranged in the water outlet channel, the cone valve body is slidingly arranged at the left end of the first valve seat, and the spray head is fixedly arranged at the right end of the first valve seat; the second spring is arranged in the first valve seat, one end of which abuts against the cone valve body, and the other end of which abuts against the spray head; in the natural state, the second spring forces the cone valve body to move left and abut against the communication between the water outlet channel and the internal flow passage of the pump body.

[0008] Preferably, the switching assembly comprises a second valve seat, a valve core, a second spring and a base; the base is fixedly arranged at the right end opening of the mounting channel; a pressure relief channel is arranged through the left end of the base, and a second opening hole for connecting the pressure relief channel and the second channel is arranged through the side wall of the base;

[0009] The second valve seat is fixedly arranged at the left end of the mounting channel, a receiving groove is arranged at the right end of the valve seat, and a first opening hole for connecting the receiving groove and the first channel is arranged through the side wall of the second valve seat;

[0010] The left end of the receiving groove is provided with a sliding hole, the left end of the valve core is slidingly arranged in the sliding hole, the second spring is located in the receiving groove and abuts against the receiving groove at the left end and abuts against the valve core at the right end; in the natural state, the second spring forces the valve core to move towards the base and abut against the closed pressure relief channel.

[0011] Preferably, a second ring groove is arranged in the side wall of the base corresponding to the position of the second channel, and the second opening hole is located in the second ring groove.

[0012] Preferably, a first ring groove is arranged in the side wall of the second valve seat corresponding to the position of the first channel, and the first opening hole is located in the first ring groove.

[0013] Preferably, the valve core comprises a rod body and a core head; the left end of the rod body is slidingly matched with the sliding hole, and the right end is fixedly connected with the core head; the effective cross-sectional area of the left end of the core head is smaller than that of the right end.

[0014] Preferably, a first sealing ring is nested on the side wall of the cone valve body, a second sealing ring is nested on the side wall of the nozzle, and a third sealing ring is nested on the side wall of the first valve seat.

[0015] Preferably, a fourth sealing ring is nested on the side wall of the base.

[0016] Preferably, a fifth sealing ring is nested on the side wall of the second valve seat, and a sixth sealing ring is nested on the side wall of the rod body.

[0017] Preferably, a seventh sealing ring is nested on the side wall of the venturi connector.

[0018] The technical effects of the utility model mainly lie in the following aspects:

[0019] When the liquid suction function is needed, the liquid is completely sprayed from the nozzle. When the cleaning machine is used for high-pressure operation, the liquid is divided into two parts, one part flows out from the built-in nozzle, and the other part is sprayed out through the first flow channel, the mounting channel, the pressure relief channel and the second channel, thereby increasing the flow area and reducing the pressure loss. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 isometric view of the plunger pump in the embodiment;

[0021] Figure 2 isometric view of the plunger pump in the embodiment;

[0022] Figure 3 isometric view of the plunger pump in the embodiment; Figure 2 isometric view of the plunger pump in the embodiment; isometric view of the plunger pump in the embodiment;

[0023] isometric view of the plunger pump in the embodiment; Figure 4 isometric view of the plunger pump in the embodiment; Figure 2 isometric view of the plunger pump in the embodiment.

[0024] Reference signs: 1, pump body; 2, cone valve body; 3, first valve seat; 4, first spring; 5, spray head; 6, venturi pipe joint; 7, second valve seat; 71, containing groove; 72, sliding hole; 73, first opening; 74, first ring groove; 8, second spring; 9, valve core; 91, rod body; 92, core head; 10, base; 101, pressure relief channel; 102, second opening; 103, second ring groove; 11, water outlet channel; 12, first sealing ring; 13, third sealing ring; 14, second sealing ring; 15, seventh sealing ring; 16, fifth sealing ring; 17, sixth sealing ring; 18-19, fourth sealing ring; 20, mounting channel; 21, first channel; 22, second channel; 211, through hole. DETAILED DESCRIPTION

[0025] The specific embodiments of the utility model are further described in detail below in combination with the drawings, so that the technical scheme of the utility model is easier to understand and master.

[0026] With reference to Figure 1 , the embodiment provides a plunger pump with high-low pressure flow passage switching, comprising a pump body 1, the pump body 1 is provided with a water outlet channel 11, a one-way valve assembly is mounted in the water outlet channel 11, and the one-way valve assembly divides the water outlet channel 11 into a left chamber and a right chamber.

[0027] A venturi pipe joint 6 is mounted at the outlet of the water outlet channel 11, and the seventh sealing ring 15 is nested on the side wall of the venturi pipe joint 6.

[0028] With reference to Figures 1-3The one-way valve assembly comprises a first valve seat 3, a conical valve body 2, a second spring 8 and a spray head 5. The first valve seat 3 is fixedly arranged on the water outlet channel 11. The conical valve body 2 is slidably arranged on the left end of the first valve seat 3. The spray head 5 is fixedly arranged on the right end of the first valve seat 3. The second spring 8 is arranged in the first valve seat 3 and abuts against the conical valve body 2 at one end and abuts against the spray head 5 at the other end. In a natural state, the second spring 8 forces the conical valve body 2 to move leftward and abut against the communication part between the water outlet channel 11 and the internal flow passage of the pump body 1. A through hole 211 is formed in the side wall of the conical valve body 2 for water to pass through. The side wall of the conical valve body 2 is nested with a first sealing ring 12. The side wall of the spray head 5 is nested with a second sealing ring 14. The side wall of the first valve seat 3 is nested with a third sealing ring 13, thereby increasing the sealing property to a certain extent.

[0029] The pump body 1 is further provided with a mounting channel 20, a first channel 21 for communicating the mounting channel 20 with the left chamber and a second channel 22 for communicating the mounting channel 20 with the right chamber.

[0030] With reference to Figure 1 2 4. A switching assembly is arranged in the mounting channel 20. The switching assembly comprises a second valve seat 7, a valve core 9, a second spring 8 and a base 10. The base 10 is fixedly arranged at the right end opening of the mounting channel 20. A pressure relief channel 101 is arranged at the left end of the base 10. A second opening 102 is formed in the side wall of the base 10 for communicating the pressure relief channel 101 with the second channel 22. More specifically, a second annular groove 103 is formed in the side wall of the base 10 corresponding to the position of the second channel 22. The second opening 102 is located in the second annular groove 103.

[0031] The second valve seat 7 is fixedly arranged at the left end of the mounting channel 20. An accommodating groove 71 is formed in the right end of the valve seat. A first opening 73 is formed in the side wall of the second valve seat 7 for communicating the accommodating groove 71 with the first channel 21. More specifically, a first annular groove 74 is formed in the side wall of the second valve seat 7 corresponding to the position of the first channel 21. The first opening 73 is located in the first annular groove 74.

[0032] The left end of the accommodating groove 71 is provided with a sliding hole 72. The valve core 9 comprises a rod body 91 and a core head 92. The left end of the rod body 91 is slidably connected with the sliding hole 72. The right end of the rod body 91 is fixedly connected with the core head 92. The effective cross-sectional area of the left end of the core head 92 is smaller than that of the right end. The second spring 8 is located in the accommodating groove 71 and abuts against the accommodating groove 71 at the left end and abuts against the valve core 9 at the right end. In a natural state, the second spring 8 forces the valve core 9 to move toward the base 10 and abut against the pressure relief channel 101.

[0033] ​In addition, the fourth sealing ring (18, 19) is nested on the side wall of the base 10, the fifth sealing ring 16 is nested on the side wall of the second valve seat 7, and the sixth sealing ring 17 is nested on the side wall of the rod body 91, so that the sealing performance is improved.

[0034] The working principle of the embodiment is as follows:

[0035] When the liquid suction condition is used, the pressure on the left end of the core head 92 is greater than the pressure on the right end, so that the valve core 9 keeps moving to the right, and the core head 92 closes the pressure relief channel 101, at this time, the high-pressure water is completely sprayed out through the nozzle 5. When the cleaning machine uses high-pressure operation, the water pressure of the second channel 22 increases, so that the pressure on the right end of the core head 92 is greater than the pressure on the left end, the valve core 9 moves to the left, the pressure relief channel 101 is opened, and a part of the high-pressure water of the valve core 9 is sprayed out from the nozzle 5, and the other part is sprayed out through the first channel 21, the pressure relief channel 101 and the second channel 22.

[0036] Of course, the above is only a typical example of the utility model, in addition to this, the utility model can have other various specific implementation manners, and the technical solutions formed by equivalent replacement or equivalent transformation all fall within the scope required for protection of the utility model.

Claims

1. A plunger pump with high and low pressure flow channel switching, comprising a pump body (1), the pump body (1) having a water outlet channel (11), a one-way valve assembly installed in the water outlet channel (11), the right end of the one-way valve assembly having a nozzle (5); a Venturi pipe fitting (6) installed at the outlet of the water outlet channel (11), the one-way valve assembly dividing the water outlet channel (11) into a left chamber and a right chamber; characterized in that, The pump body (1) is also provided with an installation channel (20), a first channel (21) for connecting the installation channel (20) with the left chamber, and a second channel (22) for connecting the installation channel (20) with the right chamber; A switching component is provided in the installation channel (20), the switching component being configured to connect or disconnect the first channel (21) and the second channel (22) in response to the water pressure difference between the first channel (21) and the second channel (22).

2. A plunger pump with high and low pressure flow channel switching according to claim 1, characterized in that, The one-way valve assembly includes a first valve seat (3), a cone valve body (2), a second spring (8), and a nozzle (5); the first valve seat (3) is fixedly disposed in the water outlet channel (11), the cone valve body (2) is slidably disposed on the left end of the first valve seat (3), and the nozzle (5) is fixedly disposed on the right end of the first valve seat (3); the second spring (8) is disposed inside the first valve seat, with one end abutting against the cone valve body (2) and the other end abutting against the nozzle (5); in the natural state, the second spring (8) forces the cone valve body (2) to move to the left and abut against the connection between the water outlet channel (11) and the internal flow channel of the pump body (1).

3. A plunger pump with high and low pressure flow channel switching according to claim 1, characterized in that, The switching assembly includes a second valve seat (7), a valve core (9), a second spring (8), and a base (10); the base (10) is fixedly disposed at the right end opening of the mounting channel (20); a pressure relief channel (101) is provided through the left end of the base (10), and a second opening (102) for connecting the pressure relief channel (101) and the second channel (22) is provided through the side wall of the base (10); The second valve seat (7) is fixedly disposed at the left end of the installation channel (20), and the right end of the valve seat is provided with a receiving groove (71), and the side wall of the second valve seat (7) is provided with a first opening (73) for connecting the receiving groove (71) and the first channel (21); The left end of the receiving groove (71) is provided with a sliding hole (72), and the left end of the valve core (9) is slidably disposed in the sliding hole (72). The second spring (8) is located in the receiving groove (71), with its left end abutting against the receiving groove (71) and its right end abutting against the valve core (9). In its natural state, the second spring (8) forces the valve core (9) to move toward the base (10) and abut against and close the pressure relief channel (101).

4. A plunger pump with high and low pressure flow channel switching according to claim 3, characterized in that, The side wall of the base (10) is provided with a second annular groove (103) corresponding to the position of the second channel (22), and the second opening (102) is located in the second annular groove (103).

5. A plunger pump with high and low pressure flow channel switching according to claim 3, characterized in that, The second valve seat (7) has a first annular groove (74) on its side wall corresponding to the position of the first channel (21), and the first opening (73) is located in the first annular groove (74).

6. A plunger pump with high and low pressure flow channel switching according to claim 3, characterized in that, The valve core (9) includes a rod body (91) and a core head (92); the left end of the rod body (91) is slidably engaged with the sliding hole (72), and the right end is fixedly connected to the core head (92); the effective cross-sectional area of ​​the left end of the core head (92) is smaller than the effective cross-sectional area of ​​the right end.

7. A plunger pump with high and low pressure flow channel switching according to claim 2, characterized in that, The cone valve body (2) has a first sealing ring (12) nested on its side wall, the nozzle (5) has a second sealing ring (14) nested on its side wall, and the first valve seat (3) has a third sealing ring (13) nested on its side wall.

8. A plunger pump with high and low pressure flow channel switching according to claim 3, characterized in that, A fourth sealing ring is nested on the side wall of the base (10).

9. A plunger pump with high and low pressure flow channel switching according to claim 6, characterized in that, The second valve seat (7) has a fifth sealing ring (16) nested on its side wall; the rod (91) has a sixth sealing ring (17) nested on its side wall.

10. A plunger pump with high and low pressure flow channel switching according to claim 1, characterized in that, The side wall of the Venturi tube fitting (6) is fitted with a seventh sealing ring (15).

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