A kind of emptying structure of self-priming pipeline of high-pressure cleaning machine

Abstract

The invention discloses an emptying structure of a self-priming pipeline of a high-pressure cleaning machine, comprising an emptying pipe connected to the outlet of a pump body pipeline, the emptying pipe having a multi-sectioned cavity formed axially through, and a cylindrical body radially formed on the emptying pipe, a drain valve cavity vertically connected to the cavity formed in the cylindrical body, an emptying valve for realizing air discharge and liquid reflux by utilizing the different masses of air and liquid installed in the drain valve cavity, and the drain valve is composed of an emptying valve core, an emptying valve spring and an emptying valve nut. The invention has reasonable design and convenient installation, and can shorten the self-priming time to the maximum extent, reduce component wear, and extend the service life of the cleaning machine.

Description

Technical Field

[0001] The invention relates to a pipeline emptying technology, in particular to an emptying structure of a self-priming pipeline of a high-pressure cleaning machine. Background Art

[0002] In the self-priming pipeline of the high-pressure cleaning machine, there must be a large amount of air remaining in the early stage. In order to achieve self-priming, the rear end of the plunger (piston) must be in a vacuum state. To achieve vacuum, the plunger (piston) must perform a large amount of reciprocating motion to compress the air in the front pipeline or exhaust the front air. Completing such a process will inevitably cause certain energy waste and certain damage to machine parts. Therefore, it is necessary to design an emptying structure so that the emptying structure can shorten the self-priming time to the maximum extent, meet the use requirements of the cleaning machine as quickly as possible, reduce the damage caused by mutual dynamic friction between the motor pump plunger and the seal of the cleaning machine, and achieve the purpose of quickly emptying the air in the pipeline. Summary of the invention

[0003] The technical problem to be solved by the present invention is to provide an emptying structure of the self-priming pipeline of a high-pressure cleaning machine in view of the status quo of the above-mentioned prior art. The emptying structure has reasonable design and convenient installation, and can shorten the self-priming time to the maximum extent, reduce component wear, and extend the service life of the cleaning machine.

[0004] The technical solution adopted by the present invention to solve the above technical problems is:

[0005] A drain structure for a self-priming pipeline of a high-pressure cleaning machine comprises a drain pipe connected to a pump body pipeline outlet, the drain pipe is axially penetrated with a multi-sectioned cavity, and a cylindrical body is radially formed on the drain pipe, a drain valve cavity vertically connected to the cavity is formed in the cylindrical body, a drain valve for realizing air discharge and liquid reflux by utilizing the different masses of air and liquid is installed in the drain valve cavity, and the drain valve is composed of a drain valve core, a drain valve spring and a drain valve nut.

[0006] To optimize the above technical solutions, the specific measures taken also include:

[0007] The above-mentioned drain valve core is slidably arranged in the drain valve cavity, the drain valve nut sealing spiral is installed in the cavity opening of the drain valve cavity, the drain valve spring is sleeved on the drain valve core, and the upper end of the drain valve spring is pressed on the boss formed on the drain valve core, and the lower end of the drain valve spring is in contact with the drain valve nut.

[0008] The exhaust valve nut is axially processed with a valve core cavity and a vent hole, the diameter of the valve core cavity is larger than the diameter of the vent hole; the vent hole and the valve core cavity are sequentially connected from bottom to top and penetrate the exhaust valve nut.

[0009] An arc-shaped sealing surface is formed between the vent hole of the above-mentioned drain valve nut and the valve core cavity, and a conical sealing surface is formed on the drain valve core; when there is liquid in the cavity, the liquid pushes the drain valve core to compress the drain valve spring to move downward so that the conical sealing surface cooperates with the arc-shaped sealing surface to seal the vent hole.

[0010] A venting hole is machined in the above-mentioned exhaust valve core, and the venting hole is composed of an axial venting hole communicating with the hole cavity and a radial hole for communicating the axial venting hole and the valve core cavity.

[0011] Two one-way valve groups with exactly the same structure are installed in the above-mentioned pump body pipeline, and the two one-way valve groups include a first one-way valve group installed at the inlet of the pump body pipeline and a second one-way valve group installed at the outlet of the pump body pipeline; a plunger cavity is connected on the pump body pipeline between the first one-way valve group and the second one-way valve group, and a plunger assembly is provided in the plunger cavity for realizing suction and discharge functions by changing the volume of the plunger cavity.

[0012] The above-mentioned one-way valve group includes a one-way valve bracket, a one-way valve seat, a one-way valve spring and a one-way valve core; the one-way valve bracket and the one-way valve seat cooperate to form a one-way valve core cavity, the one-way valve core is movably arranged in the one-way valve core cavity, the one-way valve spring is pressed into the one-way valve core cavity through the one-way valve core, the one-way valve seat is formed with a sealing cone surface, and the front end of the one-way valve core is formed with a sealing head for cooperating with the sealing cone surface seal.

[0013] The above-mentioned plunger assembly consists of a plunger that can reciprocate, a return spring and a spring chuck; the spring chuck positioning sleeve is mounted on the lower end of the plunger, the return spring is fitted with the plunger, and the upper end of the return spring presses on the pump body, and the lower end of the return spring is in contact with the spring chuck.

[0014] Compared with the prior art, the present invention is provided with an exhaust pipe at the outlet of the pump body pipeline, an exhaust valve cavity is formed in the cylindrical body of the exhaust pipe, and an exhaust valve is installed in the exhaust valve cavity to realize air discharge and liquid reflux by utilizing the different masses of air and liquid. The exhaust valve can take advantage of the different characteristics of the two different media, air and liquid, and when there is air in the exhaust pipe, the exhaust valve is opened to discharge the air, and when there is liquid in the exhaust pipe, the exhaust valve is closed to allow the liquid to reflux and gather, thereby achieving the purpose of rapidly exhausting the air in the pipeline, shortening the self-priming use time, and protecting and extending the service life of the motor pump. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of the present invention when it is in an inhalation state;

[0016] Figure 2 It is a schematic diagram of the structure of the present invention when it is in a compressed state;

[0017] Figure 3It is a schematic diagram of the structure of the exhaust valve of the present invention when it is in the exhaust state;

[0018] Figure 4 It is a schematic diagram of the structure of the drain valve of the present invention when it is in a closed state;

[0019] Figure 5 It is a schematic diagram of the structure of the exhaust valve nut of the present invention;

[0020] Figure 6 It is a structural schematic diagram of the exhaust valve core of the present invention;

[0021] Figure 7 It is a structural schematic diagram of the one-way valve group of the present invention. DETAILED DESCRIPTION

[0022] The embodiments of the present invention are further described in detail below in conjunction with the accompanying drawings.

[0023] The accompanying drawings are marked as follows: first one-way valve group A, second one-way valve group B, plunger cavity Q, pump body pipeline 1, inlet 1a, drain pipe 2, hole cavity 2a, cylindrical body 21, drain valve cavity 21a, drain valve 3, drain valve core 31, axial venting channel 31a, radial channel 31b, conical sealing surface 31c, boss 311, drain valve spring 32, drain valve nut 33, venting hole 33a, valve core cavity 33b, arcuate sealing surface 33c, one-way valve group 4, one-way valve bracket 41, one-way valve seat 42, sealing cone 42a, one-way valve spring 43, one-way valve core 44, sealing head 441, plunger assembly 5, plunger 51, return spring 52, spring chuck 53.

[0024] The present invention discloses an emptying structure for the self-priming pipeline of a high-pressure cleaning machine, which can shorten the self-priming time to the maximum extent, quickly empty the air in the pipeline, protect and extend the service life of the motor pump, and reduce the friction function loss of the machine. The emptying structure can not only be used in conjunction with the cleaning machine; it can also be used as a separate universal component in conjunction with other tools, extending the scope and width of use;

[0025] like Figures 1 to 7As shown in the figure (the small solid arrow in the figure indicates the flow direction of the liquid, and the small hollow arrow indicates the flow direction of the air), the emptying structure of the self-priming pipeline of the high-pressure cleaning machine includes an emptying pipe 2 connected to the outlet of the pump body pipeline 1, and the emptying pipe 2 is axially formed with a multi-section cavity 2a, and the aperture of each section of the cavity 2a gradually increases from front to back, and the outlet at the rear end of the cavity 2a leads to the nozzle or the switch valve. A cylindrical body 21 is radially formed at a relatively central position on the emptying pipe 2, and an emptying valve cavity 21a is formed in the cylindrical body 21. The emptying valve cavity 21a is axially penetrated from the bottom surface of the cylindrical body 21 to the cavity 2a, and is vertically connected to the cavity 2a. The drain valve 3 is installed in the drain valve cavity 21a. The drain valve 3 can utilize the characteristics of light molecular weight of air, not easy to be compressed, and uncertain shape, while the molecular weight of liquid is heavy, easy to be compressed, and certain shape. When the drain pipe 2 is compressed air, it is opened to discharge air, and when the drain pipe 2 is compressed liquid, it is closed to realize the reflux storage and accumulation of liquid. Figure 3 and Figure 4 As shown, it is composed of an exhaust valve core 31, an exhaust valve spring 32 and an exhaust valve nut 33.

[0026] In the embodiment Figure 3 and Figure 4 As shown, the drain valve core 31 is slidably arranged in the drain valve cavity 21a, the drain valve nut 33 is sealed and spirally installed in the cavity mouth of the drain valve cavity 21a, the drain valve spring 32 is sleeved on the drain valve core 31, and the upper end of the drain valve spring 32 is pressed on the boss 311 formed on the drain valve core 31, and the lower end of the drain valve spring 32 is in contact with the drain valve nut 33.

[0027] like Figure 5 As shown, the drain valve nut 33 is axially processed with a valve core cavity 33b and a vent hole 33a, and the diameter of the valve core cavity 33b is larger than the diameter of the vent hole 33a. The vent hole 33a and the valve core cavity 33b are connected from bottom to top and pass through the drain valve nut 33. The drain valve spring 32 is press-fitted into the valve core cavity 33b through the drain valve core 31. An arc-shaped sealing surface 33c is formed between the vent hole 33a of the drain valve nut 33 and the valve core cavity 33b, and a conical sealing surface 31c is formed on the drain valve core 31. Figure 4 As shown, when there is compressed liquid in the cavity 2a, under the mass and pressure of the liquid, the compressed liquid can push the drain valve core 31 to compress the drain valve spring 32 to move downward so that the conical sealing surface 31c and the arc-shaped sealing surface 33c seal and block the vent hole 33a. At this time, the liquid will flow back into the cavity 2a, causing the liquid to accumulate and accumulate pressure in the cavity 2a to form high-pressure liquid. Figure 4As shown, when the cavity 2a is filled with compressed air, since the air is light and not easily compressed, the weight and pressure of the compressed air are not enough to push the drain valve core 31 to compress the drain valve spring 32 to close the vent hole 33a. At this time, the drain valve core 31 will push the conical sealing surface 31c and the arc-shaped sealing surface 33c to separate under the spring force of the drain valve spring 32, open the vent hole 33a, and discharge the air in the cavity 2a into the atmosphere.

[0028] In the embodiment Figure 6 As shown, a venting hole is processed in the exhaust valve core 31, and the venting hole is composed of an axial venting hole 31a connected to the hole cavity 2a and a radial hole 31b used to communicate the axial venting hole 31a and the valve core cavity 33b.

[0029] like Figure 1 and Figure 2 As shown, two one-way valve groups 4 with completely identical structures are installed in the pump body pipeline 1 of the present invention, and the two one-way valve groups 4 include a first one-way valve group A installed at the inlet 1a of the pump body pipeline 1 and a second one-way valve group B installed at the outlet of the pump body pipeline 1. A plunger cavity Q is connected to the pump body pipeline 1 between the first one-way valve group A and the second one-way valve group B, and a plunger assembly 5 is provided in the plunger cavity Q to realize the suction and discharge functions by changing the volume of the plunger cavity Q.

[0030] like Figure 7 As shown, the one-way valve assembly 4 of the present invention is composed of a one-way valve bracket 41, a one-way valve seat 42, a one-way valve spring 43 and a one-way valve core 44. The one-way valve bracket 41 and the one-way valve seat 42 cooperate to form a one-way valve core cavity, the one-way valve core 44 is movably arranged in the one-way valve core cavity, the one-way valve spring 43 is press-fitted into the one-way valve core cavity through the one-way valve core 44, the one-way valve seat 42 is formed with a sealing cone 42a, and the front end of the one-way valve core 44 is formed with a sealing head 441 for sealingly cooperating with the sealing cone 42a.

[0031] from Figure 1 As can be seen in the figure, the plunger assembly 5 is composed of a plunger 51 capable of reciprocating motion, a return spring 52 and a spring chuck 53. The spring chuck 53 is positioned and clamped on the lower end of the plunger 51, the return spring 52 is fitted with the plunger 1, and the upper end of the return spring 52 presses on the pump body, and the lower end of the return spring 52 is in contact with the spring chuck 53.

[0032] The emptying structure of the present invention utilizes the principle of one-way conduction and closing of two one-way valve groups 4 arranged in the pump body pipeline 1, combined with the emptying pipe 2 and the emptying valve 3, to quickly empty the air in the pipeline and shorten the self-priming time of the high-pressure cleaning machine. The specific implementation process is as follows:

[0033] A: In the initial state of the motor pump, the two one-way valve groups 4 are under the elastic pressure of the one-way valve spring 43, so that the sealing head 441 of the one-way valve core 44 is tightly pressed against the sealing cone surface 42a of the one-way valve seat 42, realizing the one-way conduction and sealing functions.

[0034] B: When the motor rotates and drives the plunger 51 to move downward, the volume of the plunger cavity Q increases (such as Figure 1 As shown in the figure, negative pressure is formed, so that the second one-way valve group B is closed under the action of the one-way valve spring 43, and the first one-way valve group A pushes the one-way valve core 44 to open the one-way valve under the action of the negative pressure, completing a suction (negative pressure) process.

[0035] C: When the motor rotates and drives the plunger 51 to move upward, the volume of the plunger cavity Q becomes smaller (such as Figure 2 As shown in the figure, high pressure is formed, so that the first one-way valve group A is closed under the action of the one-way valve spring 43, and the second one-way valve group B pushes the one-way valve core 44 to open the one-way valve under the action of high pressure, and releases the pressure to the exhaust pipe 2 (cavity 2a), completing a discharge process.

[0036] D: The motor continues to work, the plunger 51 continuously reciprocates, and accordingly the first one-way valve group A and the second one-way valve group B are continuously opened or closed, completing the suction and discharge functions and realizing the high-pressure energy storage process.

[0037] a: When compressed air is discharged from the second one-way valve group B, the compressed air enters the cavity 2a of the exhaust pipe 2. At this time, due to the characteristics of air molecules being light, difficult to be compressed, and having uncertain shapes, the air in the cavity 2a does not have enough mass and friction to close the exhaust valve 3. Figure 3 As shown, the compressed air in the cavity 2a is discharged into the atmosphere through the venting channel of the exhaust valve core 31 and the venting hole 33a of the exhaust valve nut 33.

[0038] b: When compressed liquid (such as water) is discharged from the second one-way valve group B, the compressed liquid enters the cavity 2a of the drain pipe 2. Due to the characteristics of the compressed liquid such as heavy mass, easy compression, and morphological certainty, the high-pressure liquid has sufficient mass pressure in the cavity 2a, which will push the drain valve core 31 to compress the drain valve spring 32 and move downward to close the drain valve 3. The compressed liquid cannot be discharged through the drain valve 3 and will return to the cavity 2a for storage and accumulation. Through continuous pressure input, high-pressure liquid is finally formed to achieve the function of physical pressurization.

[0039] The present invention has a simple design, few parts, flexible and convenient assembly and use, mature manufacturing conditions and technology, can shorten the self-priming time to the maximum extent, and meet the use requirements as quickly as possible; reduce the damage caused by mutual dynamic friction between the plunger and the sealing parts of the cleaning machine motor pump; complete the rapid emptying of air in the pipeline, shorten the self-priming use time, protect and extend the service life and function loss of the motor pump, etc.

[0040] The best embodiment of the present invention has been described, and various changes or modifications made by those skilled in the art will not depart from the scope of the present invention.

Claims

1. An emptying structure for a self-priming pipeline of a high-pressure cleaning machine, comprising an emptying pipe (2) connected to an outlet of a pump pipe (1), wherein: The drain pipe (2) is axially formed with a plurality of section-shaped cavities (2a), and a columnar body (21) is radially formed on the drain pipe (2). A drain valve cavity (21a) vertically connected to the cavity (2a) is formed in the columnar body (21). A drain valve (3) is installed in the drain valve cavity (21a) for realizing air discharge and liquid reflux by utilizing the difference in mass between air and liquid. The drain valve (3) is composed of a drain valve core (31), a drain valve spring (32) and a drain valve nut (33). The drain valve core (31) is slidably arranged in the drain valve cavity (21a) up and down, the drain valve nut (33) is sealingly spirally installed in the cavity opening of the drain valve cavity (21a), the drain valve spring (32) is sleeved on the drain valve core (31), and the upper end of the drain valve spring (32) is pressed against the boss (311) formed on the drain valve core (31), and the lower end of the drain valve spring (32) is in contact with the drain valve nut (33); The exhaust valve nut (33) is axially processed with a valve core cavity (33b) and a vent hole (33a); the diameter of the valve core cavity (33b) is larger than the diameter of the vent hole (33a); the vent hole (33a) and the valve core cavity (33b) are sequentially connected from bottom to top and penetrate the exhaust valve nut (33); An arcuate sealing surface (33c) is formed between the air release hole (33a) of the drain valve nut (33) and the valve core cavity (33b), and a conical sealing surface (31c) is formed on the drain valve core (31); when liquid is in the cavity (2a), the liquid pushes the drain valve core (31) to compress the drain valve spring (32) to move downward, so that the conical sealing surface (31c) and the arcuate sealing surface (33c) are sealed and matched to block the air release hole (33a); The exhaust valve core (31) is provided with an air release channel.

2. The emptying structure of the self-priming pipeline of a high-pressure cleaning machine according to claim 1 is characterized by: Two one-way valve groups (4) of identical structure are installed in the pump body pipeline (1), and the two one-way valve groups (4) include a first one-way valve group (A) installed at the inlet (1a) of the pump body pipeline (1) and a second one-way valve group (B) installed at the outlet of the pump body pipeline (1); a plunger cavity (Q) is connected to the pump body pipeline (1) between the first one-way valve group (A) and the second one-way valve group (B), and a plunger assembly (5) is provided in the plunger cavity (Q) for realizing suction and discharge functions by changing the volume of the plunger cavity (Q).

3. The emptying structure of the self-priming pipeline of a high-pressure cleaning machine according to claim 2 is characterized by: The one-way valve assembly (4) comprises a one-way valve bracket (41), a one-way valve seat (42), a one-way valve spring (43) and a one-way valve core (44); the one-way valve bracket (41) and the one-way valve seat (42) cooperate to form a one-way valve core cavity, the one-way valve core (44) is movably arranged in the one-way valve core cavity, the one-way valve spring (43) is press-fitted into the one-way valve core cavity through the one-way valve core (44), the one-way valve seat (42) is formed with a sealing cone surface (42a), and the front end of the one-way valve core (44) is formed with a sealing head (441) for sealingly cooperating with the sealing cone surface (42a).

4. The emptying structure of the self-priming pipeline of a high-pressure cleaning machine according to claim 3 is characterized by: The plunger assembly (5) is composed of a plunger (51) capable of reciprocating movement, a return spring (52) and a spring chuck (53); the spring chuck (53) is positioned and clamped on the lower end of the plunger (51), the return spring (52) is fitted with the plunger (51), and the upper end of the return spring (52) is pressed against the pump body, and the lower end of the return spring (52) is in contact with the spring chuck (53).

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