Overflow valve structure of high-pressure cleaning machine

Abstract

The utility model provides an overflow valve structure of a high-pressure cleaning machine, and belongs to the technical field of high-pressure cleaning machines. The problems that the distance between an existing microswitch and the ground is small, and the number of plugs on a pump body is large are solved. According to the overflow valve structure of the high-pressure cleaning machine, an overflow valve assembly is arranged in a pump body and comprises an overflow valve ejector rod, the overflow valve ejector rod is provided with an abutting end capable of abutting against a microswitch, a high-pressure water outlet channel and a water return channel are formed in the pump body, the abutting end faces the side of a water outlet hole and is vertically arranged upwards, and a starting valve hole is formed in the pump body; the starting valve hole and the water return channel are arranged in the same direction and communicated with each other, an inclined hole is formed between the starting valve hole and the high-pressure water outlet channel, and a starting valve assembly is arranged in the starting valve hole. The pump body of the structure is convenient to machine and low in cost, the starting valve assembly is arranged in the starting valve hole, namely, a port of the water return channel is blocked, the number of plugs is reduced, and compared with the prior art, one plug is omitted.

Description

Technical Field

[0001] The utility model belongs to the technical field of high-pressure cleaning machines, in particular to an overflow valve structure of a high-pressure cleaning machine. Background Art

[0002] A high-pressure cleaner is a machine that uses a power device to make a high-pressure plunger pump generate high-pressure water to wash the surface of an object. It can peel off and wash away dirt to achieve the purpose of cleaning the surface of an object. During the operation of the existing high-pressure cleaner, the overflow valve is used to control the maximum pressure of the water outlet. At the same time, the linkage between the overflow valve and the micro switch is used to start and stop the motor at the moment of firing and closing the gun. The starting valve is used to buffer the sudden increase in pump pressure when firing, reduce the burden on the motor, and help the motor start.

[0003] At present, the China Patent Network discloses a low-torque starting device [Authorization Announcement No.: CN213574585U], including a pump body, a water outlet check valve, a unloading valve stem, a two-way check valve core, a base and a reset spring. The pump body is provided with a fifth flow channel, a sixth flow channel, an eighth flow channel, a return hole and a water outlet, and the fifth flow channel and the sixth flow channel are respectively communicated with the eighth flow channel and the return hole, the water outlet check valve is located between the eighth flow channel and the water outlet, the unloading valve stem is located between the return hole and the eighth flow channel, the two-way check valve core and the reset spring are both located in a chamber inside the pump body, and an O-type rubber ring is provided between the two-way check valve core and the chamber, the chamber is communicated with the fifth flow channel and the return hole, the bottom of the two-way check valve core is inserted into the top of the reset spring, and the base is located below the reset spring.

[0004] The above-mentioned low torque starting device has the following defects: during the processing of the above-mentioned water outlet, a hole is drilled horizontally on the pump body so that it has a front-to-back through channel, the front end of the channel is the water outlet, and the rear end of the channel needs to be blocked by a plug; the above-mentioned pump body also has a check valve installation hole, the two-way check valve core is also installed in the check valve installation hole, and the base of the two-way check valve is installed at the outer port of the check valve installation hole, and the base also acts as a plug. The above-mentioned pump body structure has a large number of openings, and requires a large number of plugs to block the ends of the holes.

[0005] In addition, the overflow valve structure of the existing high-pressure cleaning machine generally has a micro switch. When the high-pressure pump is placed flat, the micro switch is on the side close to the ground and the distance from the ground is very small. The use of the existing overflow valve structure will not meet the safety requirements. Utility Model Content

[0006] The purpose of the utility model is to solve the above problems in the existing technology and propose a relief valve structure for a high-pressure cleaning machine. The technical problem to be solved by the utility model is: how to solve the problem of a small distance between the micro switch and the ground and a large number of plugs on the pump body.

[0007] The purpose of the utility model can be achieved through the following technical solutions:

[0008] A relief valve structure for a high-pressure cleaning machine comprises a pump body with a water outlet, an relief valve assembly is arranged in the pump body, the relief valve assembly comprises a relief valve push rod, the relief valve push rod has a top end that can be pressed against a micro switch, a high-pressure water outlet channel and a return water channel are arranged in the pump body, the top end is arranged vertically upward toward the water outlet side, a starting valve hole is arranged in the pump body, and it is characterized in that the starting valve hole and the return water channel are arranged in the same direction and are connected to each other, an inclined hole is arranged between the starting valve hole and the high-pressure water outlet channel, and a starting valve assembly is arranged in the starting valve hole.

[0009] The orientation of the overflow valve assembly in the present structure is opposite to that of the traditional overflow valve assembly, that is, the top end of the overflow valve push rod is arranged vertically upward toward the water outlet side, so that the micro switch must also be arranged on the water outlet side. The arrangement layout of this structure makes the micro switch and the water outlet both located on the side away from the ground when the motor pump is placed flat, which solves the problem of the micro switch being too close to the ground; in addition, the starting valve hole and the return water channel are arranged in the same direction and are interconnected, so that the starting valve assembly is arranged at the extension line of the axis of the return water channel. During the processing, only one process is needed to simultaneously process the return water conduit and the starting valve hole, which makes it more convenient to process the pump body and the cost is relatively low. There is no need to additionally process the starting valve hole. The starting valve assembly is arranged in the starting valve hole, which is equivalent to blocking the port of the return water channel, reducing the number of plugs and using one less plug compared with the prior art.

[0010] In the above-mentioned overflow valve structure of a high-pressure cleaning machine, the pump body is provided with a water inlet channel and a reflux channel, one end of the reflux channel is connected to the return water channel and the starting valve hole, and the other end is connected to the water inlet channel, and the return water channel, the water inlet channel and the reflux channel are arranged in an I-shape.

[0011] In the above-mentioned overflow valve structure of a high-pressure cleaning machine, the pump body is provided with an overflow valve mounting hole, the overflow valve assembly is arranged in the overflow valve mounting hole, and one end of the return water channel is connected to the overflow valve mounting hole.

[0012] In the above-mentioned overflow valve structure of a high-pressure cleaning machine, the starting valve assembly includes a valve seat arranged in the return water channel and a base threadedly connected to the outer port of the return water channel and pressing the valve seat, and a ball and a spring that makes the ball have a tendency to always move toward the base are arranged in the valve seat.

[0013] Compared with the prior art, the overflow valve structure of the high-pressure cleaning machine of the utility model has the following advantages: the direction of the overflow valve assembly in the present structure is opposite to that of the traditional overflow valve assembly, that is, the top end of the overflow valve push rod is arranged toward the water outlet side, so that the micro switch must also be arranged on the water outlet side. The arrangement layout of this structure makes the micro switch and the water outlet both located on the side away from the ground when the motor pump is placed horizontally, which solves the problem that the micro switch is too close to the ground; in addition, the starting valve hole and the return water channel are coaxially arranged, so that the starting check valve is arranged at the extension line of the axis of the return water channel. During the processing, only one process is needed to simultaneously process the return water conduit and the starting valve hole, which makes it more convenient to process the pump body and the cost is relatively low. There is no need to additionally process the starting valve hole. The starting check valve is arranged in the starting valve hole, which is equivalent to blocking the port of the return water channel, reducing the number of plugs and using one less plug compared with the prior art. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a three-dimensional structural schematic diagram of the utility model.

[0015] Figure 2 It is one of the cross-sectional structural schematic diagrams of the utility model.

[0016] Figure 3 This is the second schematic diagram of the cross-sectional structure of the present utility model.

[0017] In the figure, 1, pump body; 2, water outlet hole; 3, overflow valve assembly; 30a, top end; 4, high-pressure water outlet channel; 5, return water channel; 6, starting valve hole; 7, starting valve assembly; 70, valve seat; 71, base; 72, ball; 73, spring; 8, water inlet channel; 9, return channel; 10, overflow valve mounting hole; 11, inclined hole. DETAILED DESCRIPTION

[0018] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

[0019] like Figure 1 , Figure 2 and Figure 3As shown, the overflow valve structure of the high-pressure cleaning machine includes a pump body 1 with a water outlet 2, an overflow valve assembly 3 is arranged in the pump body 1, the overflow valve assembly 3 includes an overflow valve push rod 30, the overflow valve push rod 30 has a top end 30a that can be pressed against the micro switch, a high-pressure water outlet channel 4 and a return water channel 5 are provided in the pump body 1, the top end 30a is vertically upwardly arranged toward the water outlet 2 side, a starting valve hole 6 is provided in the pump body 1, the starting valve hole 6 and the return water channel 5 are arranged in the same direction and are connected to each other, an inclined hole 11 is provided between the starting valve hole 6 and the high-pressure water outlet channel 4, and a starting valve assembly 7 is provided in the starting valve hole 6. The orientation of the overflow valve assembly 3 in the present structure is opposite to that of the traditional overflow valve assembly, that is, the top end 30a of the overflow valve push rod 30 is arranged vertically upward toward the side of the water outlet hole 2, so that the micro switch must also be arranged on the side of the water outlet hole 2. The arrangement layout of this structure makes it possible for the micro switch and the water outlet hole 2 to be located on the side away from the ground when the motor pump is placed horizontally, thereby solving the problem that the micro switch is too close to the ground. In addition, the starting valve hole 6 is coaxially arranged with the return water channel 5, so that the starting valve assembly 7 is arranged at the extension line of the axis of the return water channel 5. During the processing, only one process is required to simultaneously process the return water conduit 5 and the starting valve hole 6, which makes it more convenient to process the pump body and the cost is relatively low. There is no need to additionally process the starting valve hole 6. The starting valve assembly 7 is arranged in the starting valve hole 6, which is equivalent to blocking the port of the return water channel 5, reducing the number of plugs and using one less plug compared with the prior art.

[0020] like Figure 1 , Figure 2 and Figure 3 As shown, the pump body 1 has a water inlet channel 8 and a return channel 9. One end of the return channel 9 is connected to the return channel 5 and the starting valve hole 6, and the other end is connected to the water inlet channel 8. The return channel 5, the water inlet channel 8 and the return channel 9 are arranged in an I-shaped shape. The pump body 1 has an overflow valve mounting hole 10. The overflow valve assembly 3 is arranged in the overflow valve mounting hole 10. One end of the return channel 5 is connected to the overflow valve mounting hole 10. After the gun is shut down, the pressure increases, and the high-pressure water in the high-pressure water outlet channel enters the overflow valve assembly 3 and pushes the overflow valve push rod 30 to enter the return water conduit 5. At the same time, the moving overflow valve push rod 30 touches the micro switch and cuts off the power, so that the motor stops running. After firing, part of the high-pressure water in the high-pressure water outlet channel enters the starting valve hole 6 through the inclined hole, and the high-pressure water pushes the starting valve assembly 7 to enter the return channel 9. The water in the return channel 9 enters the water inlet channel 8 to help the motor start.

[0021] like Figure 3 As shown, the starting valve assembly 7 includes a valve seat 70 arranged in the return water channel 5 and a base 71 threadedly connected to the outer port of the return water channel 5 and pressing the valve seat 70. A ball 72 and a spring 73 that makes the ball 72 have a tendency to always move toward the base are arranged in the valve seat 70.

[0022] The specific embodiments described herein are merely examples of the spirit of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in similar ways, but they will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

Claims

1. A relief valve structure for a high-pressure cleaning machine, comprising a pump body (1) having a water outlet (2), a relief valve assembly (3) being arranged in the pump body (1), the relief valve assembly (3) comprising a relief valve push rod (30), the relief valve push rod (30) having a top end (30a) capable of abutting against a micro switch, a high-pressure water outlet channel (4) and a return water channel (5) being arranged in the pump body (1), the top end (30a) being arranged vertically upward toward the water outlet (2), and a starting valve hole (6) being arranged in the pump body (1), It is characterized in that The starting valve hole (6) and the return water channel (5) are arranged in the same direction and are interconnected. An inclined hole (11) is arranged between the starting valve hole (6) and the high-pressure water outlet channel (4). A starting valve assembly (7) is arranged in the starting valve hole (6).

2. The overflow valve structure of a high pressure cleaning machine according to claim 1, It is characterized in that The pump body (1) has a water inlet channel (8) and a return channel (9), one end of the return channel (9) is connected to the return channel (5) and the starting valve hole (6), and the other end is connected to the water inlet channel (8), and the return channel (5), the water inlet channel (8) and the return channel (9) are arranged in an I-shape.

3. The overflow valve structure of a high pressure cleaning machine according to claim 2, It is characterized in that The pump body (1) has an overflow valve mounting hole (10), the overflow valve assembly (3) is arranged in the overflow valve mounting hole (10), and one end of the return water channel (5) is connected to the overflow valve mounting hole (10).

4. The overflow valve structure of a high pressure cleaning machine according to claim 1, It is characterized in that The starting valve assembly (7) comprises a valve seat (70) arranged in the return water channel (5) and a base (71) threadedly connected to the outer port of the return water channel (5) and pressing the valve seat (70). A ball (72) and a spring (73) which makes the ball (72) have a tendency to always move towards the base are arranged in the valve seat (70).

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