An overflow valve structure

Abstract

The utility model belongs to the technical field of overflow valve, disclose a kind of overflow valve structure, including overflow valve body and microswitch, the inside of overflow valve body is provided with inner chamber, the inside of inner chamber is provided with valve seat, valve seat separates the inside of inner chamber into upper cavity and lower cavity, one end of overflow valve body is provided with water inlet, water inlet is connected by water inlet channel with upper cavity between intercommunication, the other end of overflow valve body is provided with the water outlet being interconnected with upper cavity, the inside of overflow valve body is provided with inclined channel, one end of inclined channel is interconnected with water outlet, the other end of inclined channel is interconnected with the top of upper cavity, the utility model discloses in triggering shutdown process, high pressure in upper cavity can be discharged into lower cavity by round table hole, and discharge through pressure relief hole, avoid valve body to be in high pressure state for a long time, help to improve the sealing performance and service life of sealing ring.

Description

Technical Field

[0001] This utility model relates to the field of overflow valve technology, and in particular to an overflow valve structure. Background Technology

[0002] A high-pressure washer is a cleaning device that uses a high-pressure water conversion device (usually a high-pressure plunger pump) to pressurize water through several stages to a pressure of several hundred atmospheres or more, and then ejects it through a high-pressure water gun. The plunger pump is an important component of the high-pressure washer, and the overflow valve is an important component of the plunger pump.

[0003] Chinese utility model patent CN208281590U discloses an overflow stop structure for a high-pressure washer, including an overflow valve body and a switching mechanism that cooperates with the overflow valve body; it also includes a main valve assembly, which includes a housing connected to the overflow valve body, a main valve core assembly disposed in the center of the housing, and a return spring disposed between the end of the main valve core assembly and the housing; the overflow valve core assembly is disposed in the overflow valve body, one end of the overflow valve core assembly corresponds to the end of the main valve core assembly, and the other end of the overflow valve core assembly is disposed with a push rod assembly, and the overflow valve core assembly moves laterally along the inner wall of the overflow valve body.

[0004] It utilizes changes in water pressure to activate the internal structure of the overflow valve, rather than directly triggering the microswitch with water flow. As a result, the shutdown response is more precise, improving the stability of the overflow valve and preventing accidental activation of the microswitch due to external water pressure issues.

[0005] However, in actual use, after the plunger pump is triggered to close, the valve body of the above-mentioned relief valve structure is always under high pressure, which will reduce the sealing performance of the sealing ring inside the relief valve over time.

[0006] Therefore, an overflow valve structure is proposed. Utility Model Content

[0007] The purpose of this invention is to provide an overflow valve structure that solves or at least alleviates one or more of the aforementioned problems and other issues existing in the prior art.

[0008] To achieve the above objectives, the main technical solutions adopted by this utility model include: An overflow valve structure includes an overflow valve body and a micro switch. The overflow valve body has an internal cavity, and a valve seat is disposed inside the internal cavity. The valve seat divides the internal cavity into an upper cavity and a lower cavity. One end of the overflow valve body is provided with a water inlet, which is connected to the upper cavity through a water inlet channel. The other end of the overflow valve body is provided with a water outlet connected to the upper cavity. An inclined channel is provided inside the overflow valve body, one end of which is connected to the water outlet, and the other end of which is connected to the top of the upper cavity. An overflow valve stem is installed in the inner sliding seal of the upper cavity. An overflow valve core is fixedly connected to the lower end of the overflow valve stem. A truncated round hole is opened in the middle of the valve seat. A plug is fixedly connected to the lower end of the overflow valve core after it slides through the truncated round hole. When the overflow valve is in the open state, the plug can block the truncated round hole. A top rod sealing ring is fixedly connected to the lower end of the lower cavity. A switch top rod is slidably sealed inside the top rod sealing ring. The top of the switch top rod abuts against the bottom of the plug. The lower end of the switch top rod can squeeze the slider switch on the micro switch, thereby triggering the micro switch to operate.

[0009] In an overflow valve structure according to the present invention, a main valve core assembly and a main valve spring are provided inside the overflow valve body at one end near the outlet. The main valve spring is located on the side of the main valve core assembly away from the upper cavity. One end of the main valve spring abuts against the interior of the overflow valve body, and the other end of the main valve spring abuts against one end of the main valve core assembly.

[0010] In a relief valve structure according to the present invention, a first spring is sleeved on the relief valve stem, the top of the first spring abuts against the bottom of the upper end of the relief valve stem, and the other end of the first spring presses against the valve seat.

[0011] In an overflow valve structure according to the present invention, a first sealing ring is provided between the valve seat and the inner wall of the inner cavity.

[0012] In an overflow valve structure according to the present invention, a second spring is sleeved on the switch rod, the top of the second spring abuts against the bottom of the upper end of the switch rod, and the bottom of the second spring presses against the sealing ring of the switch rod.

[0013] In a relief valve structure according to the present invention, a pressure relief hole communicating with the lower cavity is provided on the outer shell of the relief valve body.

[0014] This utility model has at least the following beneficial effects: During the shutdown process, the high pressure in the upper chamber can be released into the lower chamber through the inverted frustum hole and discharged through the pressure relief hole, which avoids the valve body being in a high-pressure state for a long time. This helps to improve the sealing performance and service life of the sealing ring. The pressure relief hole connected to the lower chamber can release the pressure accumulated in the lower chamber, preventing pressure accumulation from affecting the smooth operation of the switch rod. Attached Figure Description

[0015] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings: Figure 1 This is a schematic diagram of the structure of the present invention when it is in the open state; Figure 2 This is a schematic diagram of the structure of the present invention when it is in the closed state.

[0016] Explanation of icon numbers: 1. Overflow valve body; 2. Inlet; 201. Inlet channel; 3. Outlet; 4. Inner cavity; 5. Main valve core assembly; 6. Main valve spring; 7. Overflow valve stem; 8. First spring; 9. Overflow valve core; 901. Plug; 10. Valve seat; 1001. Frustum hole; 11. Push rod sealing ring; 12. Switch push rod; 13. Second spring; 14. Sliding switch; 15. Micro switch; 16. Angled channel. Detailed Implementation

[0017] The following will describe in detail the implementation of this application with reference to the accompanying drawings and embodiments, so that the implementation process of how this application uses technical means to solve technical problems and achieve technical effects can be fully understood and implemented accordingly.

[0018] Please refer to Figures 1 to 2As shown, an embodiment of this utility model provides an overflow valve structure, including an overflow valve body 1 and a micro switch 15. The overflow valve body 1 has an internal cavity 4, and a valve seat 10 is disposed inside the internal cavity 4, dividing the internal cavity 4 into an upper cavity and a lower cavity. One end of the overflow valve body 1 has a water inlet 2, which is connected to the upper cavity via a water inlet channel 201. The other end of the overflow valve body 1 has a water outlet 3 connected to the upper cavity. An inclined channel 16 is provided inside the overflow valve body 1, one end of which is connected to the water outlet 3, and the other end of which is connected to the top of the upper cavity. The upper cavity... An overflow valve stem 7 is installed in the sliding seal of the valve seat 10. An overflow valve core 9 is fixedly connected to the lower end of the overflow valve stem 7. A truncated cone hole 1001 is opened in the middle of the valve seat 10. The lower end of the overflow valve core 9 slides through the truncated cone hole 1001 and is fixedly connected to a plug 901. When the overflow valve is in the open state, the plug 901 can block the truncated cone hole 1001. A top rod sealing ring 11 is fixedly connected to the lower end of the lower cavity. A switch top rod 12 is installed in the sliding seal of the top rod sealing ring 11. The top of the switch top rod 12 abuts against the bottom of the plug 901. The lower end of the switch top rod 12 can squeeze the slider switch 14 on the micro switch 15, thereby triggering the micro switch 15 to act.

[0019] By adopting the above technical solution, the inner cavity 4 of the overflow valve body 1 can be divided into an upper cavity and a lower cavity by the valve seat 10; the inlet 2 can deliver high-pressure water to the upper cavity through the inlet channel 201, and the outlet 3 can output the high-pressure water from the upper cavity outward. The overflow valve stem 7, which is slidably and sealed inside the upper cavity, has an overflow valve core 9 fixedly connected to its lower end, which can drive the plug 901 at the lower end to seal the inverted frustum hole 1001 in the middle of the valve seat 10 when the overflow valve is in the open state. Inside the top rod sealing ring 11 fixedly connected to the lower end of the lower cavity, the switch top rod 12 is slidably sealed and installed. Its top can abut against the bottom of the plug 901. The lower end of the switch top rod 12 can squeeze the slider switch 14 on the micro switch 15, thereby triggering the micro switch 15 to complete the action. During the process of the switch top rod 12 moving downward to squeeze the slider switch 14, the high pressure in the upper cavity flows into the lower cavity through the inverted frustum hole 1001, which reduces the pressure inside the overflow valve body 1.

[0020] In this embodiment, a main valve core assembly 5 and a main valve spring 6 are provided inside the overflow valve body 1 near the outlet 3. The main valve spring 6 is located on the side of the main valve core assembly 5 away from the upper cavity. One end of the main valve spring 6 abuts against the interior of the overflow valve body 1, and the other end of the main valve spring 6 abuts against one end of the main valve core assembly 5.

[0021] By adopting the above technical solution, the main valve core assembly 5, which is installed inside the overflow valve body 1 near the outlet 3, can cooperate with the main valve spring 6 to operate. When it is open, the main valve spring 6 is in a compressed state, and the main valve core assembly 5 releases the blockage at the connection between the upper cavity and the outlet 3. After it is closed, under the elastic force of the main valve spring 6, the main valve core assembly 5 re-blocks the connection between the upper cavity and the outlet 3.

[0022] In this embodiment, a first spring 8 is sleeved on the overflow valve stem 7. The top of the first spring 8 abuts against the bottom of the upper end of the overflow valve stem 7, and the other end of the first spring 8 presses against the valve seat 10.

[0023] By adopting the above technical solution, the first spring 8 sleeved on the overflow valve stem 7 can abut against the bottom of the upper end of the overflow valve stem 7 at its top, and press against the valve seat 10 at its other end; under the elastic force of the first spring 8, the overflow valve stem 7 can be pushed to maintain the corresponding position state, assisting the overflow valve stem 7 to complete the reset and other actions.

[0024] In this embodiment, a first sealing ring is provided between the valve seat 10 and the inner wall of the inner cavity 4.

[0025] By adopting the above technical solution, the first sealing ring provided between the valve seat 10 and the inner wall of the inner cavity 4 can enhance the sealing effect between the valve seat 10 and the inner wall of the inner cavity 4, avoid cross-pressure between the upper cavity and the lower cavity, and ensure the pressure stability inside the cavity.

[0026] In this embodiment, a second spring 13 is sleeved on the switch rod 12. The top of the second spring 13 abuts against the bottom of the upper end of the switch rod 12, and the bottom of the second spring 13 presses against the rod sealing ring 11.

[0027] By adopting the above technical solution, the second spring 13 sleeved on the switch rod 12 can abut against the bottom of the upper end of the switch rod 12 at its top and press against the rod sealing ring 11 at its bottom. Under the elastic force of the second spring 13, the switch rod 12 can be pushed to maintain the corresponding position state, assisting the switch rod 12 to complete the reset and other actions.

[0028] In this embodiment, the outer shell of the overflow valve body 1 is provided with a pressure relief hole that communicates with the lower cavity.

[0029] By adopting the above technical solution, the pressure relief hole on the outer shell of the overflow valve body 1, which is connected to the lower cavity, can discharge the pressure accumulated inside the lower cavity to the outside, thus avoiding the pressure accumulation in the lower cavity from affecting the smoothness of the operation of the switch rod 12.

[0030] Working principle: 1. Initial start-up stage: High-pressure water enters through inlet 2 and is delivered to the upper cavity through inlet channel 201; under the elastic force of the first spring 8, the overflow valve stem 7 drives the plug 901 at the lower end of the overflow valve core 9 to seal the inverted frustum hole 1001 in the middle of the valve seat 10; at the same time, the upper cavity forms a high-pressure zone to apply pressure to the main valve core assembly 5, thereby overcoming the elastic force of the main valve spring 6 and connecting the upper cavity with the outlet 3, and the high-pressure water is output outward through the outlet 3, and the overflow valve is in the open working state.

[0031] 2. Pressure Anomaly Triggering Stage: When the pressure at outlet 3 increases, under the back impact of water pressure, the water pressure inside the upper cavity rises synchronously, causing high-pressure water to enter the top of the overflow valve rod 7 through the inclined channel 16, applying pressure to the overflow valve rod 7. This pressure overcomes the elastic force of the first spring 8, pushing the overflow valve rod 7 to slide downwards; the overflow valve core 9 moves downwards with the overflow valve rod 7, causing the plug 901 to disengage from the inverted frustum hole 1001, and the bottom of the plug 901 pushes the switch top rod 12 downwards; the switch top rod 12 slides within the top rod sealing ring 11, and its lower end presses the slider switch 14 on the micro switch 15, triggering the micro switch 15 to act, thereby issuing a stop command; During the above process, the main valve core assembly 5 blocks the connection channel between the upper cavity and the outlet 3 under the elastic force of the main valve spring 6. When the plug 901 moves downward, the high pressure in the upper cavity is released into the lower cavity through the inverted frustum hole 1001 and discharged through the pressure relief hole.

[0032] 3. Shutdown and Reset Stage: After the plunger pump stops, the water pressure inside the upper chamber decreases, and the elastic force of the first spring 8 pushes the overflow valve rod 7 to move upward and reset, and the plug 901 re-seals the inverted truncated cone hole 1001; at the same time, the elastic force of the second spring 13 pushes the switch top rod 12 to move upward and reset, releasing the pressure on the slider switch 14; the overflow valve returns to its initial state and waits for the next start-up.

[0033] The foregoing description illustrates and describes several preferred embodiments of the present invention. However, as previously stated, it should be understood that the present invention is not limited to the forms disclosed herein and should not be construed as excluding other embodiments. It can be used in various other combinations, modifications, and environments, and can be altered within the scope of the present invention's conception through the foregoing teachings or related technical or knowledge. Any modifications and variations made by those skilled in the art that do not depart from the spirit and scope of the present invention should be within the protection scope of the appended claims.

Claims

1. An overflow valve structure, characterized in that, The device includes an overflow valve body and a micro switch. The overflow valve body has an internal cavity, and a valve seat is provided inside the internal cavity. The valve seat divides the internal cavity into an upper cavity and a lower cavity. One end of the overflow valve body has a water inlet, which is connected to the upper cavity through a water inlet channel. The other end of the overflow valve body has a water outlet, which is connected to the upper cavity. The overflow valve body has an inclined channel inside, one end of which is connected to the water outlet, and the other end of which is connected to the top of the upper cavity. An overflow valve stem is installed in the inner sliding seal of the upper cavity. An overflow valve core is fixedly connected to the lower end of the overflow valve stem. A truncated round hole is opened in the middle of the valve seat. A plug is fixedly connected to the lower end of the overflow valve core after it slides through the truncated round hole. When the overflow valve is in the open state, the plug can block the truncated round hole. A top rod sealing ring is fixedly connected to the lower end of the lower cavity. A switch top rod is slidably sealed inside the top rod sealing ring. The top of the switch top rod abuts against the bottom of the plug. The lower end of the switch top rod can squeeze the slider switch on the micro switch, thereby triggering the micro switch to operate.

2. The overflow valve structure according to claim 1, characterized in that: The overflow valve body has a main valve core assembly and a main valve spring inside the end near the outlet. The main valve spring is located on the side of the main valve core assembly away from the upper cavity. One end of the main valve spring abuts against the interior of the overflow valve body, and the other end of the main valve spring abuts against one end of the main valve core assembly.

3. The overflow valve structure according to claim 1, characterized in that: A first spring is fitted on the overflow valve stem, with the top of the first spring abutting against the bottom of the upper end of the overflow valve stem, and the other end of the first spring pressing against the valve seat.

4. The overflow valve structure according to claim 3, characterized in that: A first sealing ring is provided between the valve seat and the inner wall of the cavity.

5. The overflow valve structure according to claim 1, characterized in that: A second spring is fitted onto the switch rod, with the top of the second spring abutting against the bottom of the upper end of the switch rod and the bottom of the second spring pressing against the sealing ring of the switch rod.

6. A relief valve structure according to any one of claims 1-5, characterized in that: The overflow valve body has a pressure relief hole on its outer shell that communicates with the lower cavity.

Images