A splash-proof emptying device for a water pump and a water pump

Abstract

The utility model belongs to the technical field of fluid machinery, concretely relates to a kind of anti-spray emptying device for water pump, is installed in the emptying port of water pump, for the emptying of water pump;Including ball valve, guide pipe and control structure, the emptying port is provided with internal thread, the water inlet end of the ball valve is provided with threaded portion, the ball valve is installed in the emptying port by the threaded portion and the internal thread, the water outlet end of the ball valve is connected with one end of the guide pipe, the other end of the guide pipe extends to drainage system;Valve cavity of the ball valve is provided with valve core, the control structure is connected with the valve core transmission, for driving the valve core movement to open the ball valve after being stressed;In the present application, water pump works after motor energization, and water flow is pressurized from water inlet and output to water outlet, if necessary, gas is discharged through emptying port, and then gas and a small amount of water mist are guided through guide pipe, to avoid water flow splashing during emptying and cause potential safety hazard of motor.

Description

Technical Field

[0001] This utility model belongs to the field of fluid machinery technology, specifically relating to a splash-proof and air-draining device for a water pump and a water pump. Background Technology

[0002] The industrial cooling system in the power workshop of a cigarette factory is a key auxiliary system ensuring the stable operation of cigarette production. Its core function is to provide stable cooling water for equipment and processes in workshops such as tobacco processing, packaging, and air conditioning. The cooling devices in the industrial cooling system, as core heat dissipation components, dissipate the heat carried by the return water into the environment, lowering the water temperature to a reusable level. Water pumps are indispensable in commonly used cooling devices for circulating cooling water or other media. The installation of a vent valve on the pump body is crucial for ensuring the safe and efficient operation of the system. Its core function is to remove accumulated gas within the pump body, preventing cavitation. Cavitation refers to the corrosive damage to the impeller and pump casing caused by gas collapse in a high-pressure area; it also leads to increased vibration and noise.

[0003] The vent valve ensures the pump chamber is filled with liquid by periodically or continuously venting air, avoiding the risk of "dry running" during pump startup and protecting the pump's mechanical seals and bearings from overheating damage. However, venting the pump can also cause water splashing, posing a safety hazard to the motor, and water mist can corrode sensitive components such as the junction box, affecting the pump's lifespan. Utility Model Content

[0004] The purpose of this invention is to provide a splash-proof and venting device for water pumps and a water pump in order to solve the problems mentioned in the background art.

[0005] To achieve the above-mentioned technical objectives, the technical solution adopted by this utility model is as follows:

[0006] A splash-proof venting device for a water pump is installed at the vent of the water pump for venting the pump. It includes a ball valve, a guide pipe, and a control structure. The vent has an internal thread, and the inlet end of the ball valve has a threaded portion. The ball valve is installed at the vent via the threaded portion and the internal thread. The outlet end of the ball valve is connected to one end of the guide pipe, and the other end of the guide pipe extends to the workshop drainage system. A valve core is disposed within the valve cavity of the ball valve. The control structure is kinetically connected to the valve core and is used to drive the valve core to move and open the ball valve when subjected to force. The guide pipe is used to discharge gas from the water pump when the ball valve is open and to guide the drainage from the ball valve to the workshop drainage system for discharge.

[0007] When the control structure of this pump is triggered during operation, the ball valve opens to release trace amounts of dissolved gas in the pump medium, maintaining stable water flow. In emergencies, manual pressure relief is also possible to prevent pipelines from bursting due to sudden pressure increases. During venting, the guide pipe guides the gas and water flow, eliminating the problem of water splashing that often threatens motor safety with traditional venting valves. The trace amounts of water (or water mist) during venting are directed and discharged through the guide pipe, protecting the motor and extending the pump's service life.

[0008] Furthermore, a valve seat is integrally provided inside the valve cavity, and a through hole is opened in the center of the valve seat. The through hole communicates with the water inlet end of the ball valve. The valve core is coaxially installed with the through hole. The valve core is connected to a valve stem. A sealing ring is installed on the outer circumferential surface of the valve stem. A mounting hole is opened at the top of the valve stem. A spring is installed in the mounting hole. The top of the spring abuts against the top wall of the valve cavity.

[0009] The spring provides a preload to the valve core, ensuring that the valve core remains closed to the through hole under normal conditions. Thus, during normal pump operation, water flows out from the outlet. When the gas level inside the pump exceeds the limit, the excessive pressure causes the valve core to be pushed, opening the through hole and releasing the gas. Subsequently, the reduced gas pressure causes the valve core to reset. This reduces the risk of cavitation, ensures safe pump operation, and improves pump maintenance efficiency.

[0010] Furthermore, a control port is provided on the top outer side of the valve cavity, and a threaded hole is provided on the top of the valve stem corresponding to the control port. A countersunk stud is installed in the threaded hole. The control structure includes a hinge lug and a handle. The hinge lug is fixedly disposed on the outer edge of the control port. One end of the handle is hinged to the hinge lug. A protrusion extends from the end of the handle near the countersunk stud and overlaps with the countersunk stud. The other end of the handle is set as a free end.

[0011] This structural design allows the valve stem and valve core to be raised by moving the handle, thus releasing the seal on the through hole; in this way, manual pressure relief is achieved in emergencies, making it highly practical.

[0012] Furthermore, the control structure also includes a float valve, a limit bracket is installed on the vent, the float valve is suspended on the side of the vent away from the ball valve by a valve core abutment rod, and the float valve is capable of moving in the vertical direction, with the top end of the valve core abutment rod abutting against the valve core.

[0013] The float valve can be directly linked with the ball valve to control the pressure relief of gas. The pressure contact area between the float valve and the gas is larger than the contact area between the valve core and the gas, which amplifies the increase in gas pressure. This, in turn, pushes the valve core, controlling the timely opening of the through-hole to automatically relieve pressure and vent gas, making it highly practical.

[0014] Furthermore, the pump head of the water pump has an arc-shaped surface on the inner wall near the drain port, and the float valve is a hemispherical structure with a round upper part and a flat lower part; the radius of the arc-shaped surface is larger than the radius of the float valve.

[0015] The curved surface reduces the installation space occupied by the float valve inside the pump, avoiding interference with the normal operation of the pump. At the same time, the curved surface works directly with the float valve to increase the contact area with gas, which helps to automatically monitor the accumulation of gas inside the pump and trigger the ball valve to vent the gas in a timely manner.

[0016] Furthermore, the control structure also includes a timer and a servo motor electrically connected to the timer. The servo motor is mounted on the water pump, and its output end is connected to the free end of the handle. The timer is used to periodically power on the servo motor, which drives the handle to rotate. The rotation of the handle pushes the valve core to open the through hole.

[0017] Among them, the ball valve can be opened in three ways: timed evacuation via a timer, manual operation of the handle, and push of the valve core by the float valve. This makes it suitable for more complex application scenarios and highly practical.

[0018] This utility model also provides a water pump, including a motor, a pump head, and a splash-proof and venting device for the water pump; the motor is fixedly connected to the pump head, an impeller is provided inside the pump head, and the impeller is connected to the output end of the motor; the pump head has an inlet, an outlet, and a vent, and the splash-proof and venting device for the water pump is installed at the vent of the pump head; a check valve is installed at the outlet of the pump head.

[0019] The utility model adopting the above technical solution has the following advantages:

[0020] In this application, during daily operation, the water pump can vent gas from the pump by controlling a ball valve installed at the vent port. The control structure is triggered conditionally, such as manually, when the gas pressure exceeds the limit, or by a timer. It is applicable in various scenarios. When venting via the ball valve, the ball valve, in conjunction with the guide pipe, guides the gas and any entrained water mist (or water flow), preventing splashing onto the motor control box, wiring, etc., thus avoiding potential safety hazards. With the float valve installed, the ball valve at the vent port can automatically release trace amounts of dissolved gas from the pump medium, maintaining stable water flow. In emergencies, manual pressure relief can be performed by moving the handle to prevent pipe bursts due to sudden pressure increases. In maintenance scenarios, the ball valve at the vent port allows for rapid venting of residual liquid from the pump, preventing media leakage and contamination during disassembly and preventing pump body cracking due to freezing in winter. Components such as the guide pipe and handle can be made of 316L stainless steel, which is corrosion-resistant. Attached Figure Description

[0021] This utility model can be further illustrated by the non-limiting embodiments given in the accompanying drawings;

[0022] Figure 1 This is a schematic diagram of an embodiment of the anti-splash and venting device for a water pump according to the present invention;

[0023] Figure 2 This is a schematic diagram of the pump head and ball valve in an embodiment of the present invention;

[0024] Figure 3 This is a front view of the pump head and ball valve in an embodiment of the present utility model;

[0025] Figure 4 for Figure 3 Schematic diagram of the cross-sectional structure along the AA direction;

[0026] Figure 5 for Figure 4 Enlarged structural diagram at point B;

[0027] Figure 6 This is another cross-sectional view of the pump head and ball valve in this embodiment of the present invention;

[0028] The symbols for the main components are explained below:

[0029] 101. Motor; 102. Junction box; 103. Handle; 104. Connecting flange; 105. Outlet; 106. Drain port; 107. Pump head; 108. Inlet; 109. Ball valve; 1091. Inlet channel; 1092. Valve chamber; 1093. Valve core; 1094. Spring; 1095. Valve stem; 1096. Countersunk stud; 1097. Outlet channel; 110. Mounting base; 111. Guide tube; 112. Handle; 113. End cap; 114. Check valve; 115. Drive shaft hole; 116. Pump head inner cavity; 117. Hinge shaft; 118. Float valve; 119. Valve core push rod; 120. Arc-shaped surface. Detailed Implementation

[0030] The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that similar or identical parts are referred to by the same reference numerals in the drawings or description. Implementations not shown or described in the drawings are forms known to those skilled in the art. Furthermore, directional terms mentioned in the embodiments, such as "up," "down," "top," "bottom," "left," "right," "front," and "back," are only for reference to the directions in the drawings and are not intended to limit the scope of protection of the present invention.

[0031] like Figures 1 to 5 As shown, in one embodiment, a water pump anti-splash venting device is installed at the venting port 106 of the water pump for venting the water pump; the water pump generally includes a motor 101 and a pump head 107, the output end of the motor 101 extends into the pump head 107 and is equipped with an impeller; generally, the motor 101 is provided with a junction box 102 for wiring, such as... Figure 1As shown. The pump head 107 has an inlet 108, an outlet 105, and a drain port 106. The specific locations of the inlet 108, outlet 105, and drain port 106 are selected according to actual needs. In practice, the inlet 108 can be located on the side of the pump head 107 away from the motor 101, and the outlet 105 and drain port 106 can be located on the top wall of the pump head 107. However, drainage from the drain port 106 may affect the junction box 102. The anti-splash venting device for the water pump includes a ball valve 109, a guide pipe 111, and a control structure. The vent 106 has an internal thread, and the inlet end of the ball valve 109 has a threaded portion, which is a section of external thread. The ball valve 109 is installed in the vent 106 via the threaded portion and the internal thread. The outlet end of the ball valve 109 is connected to one end of the guide pipe 111, and the other end of the guide pipe 111 extends to the workshop drainage system. A valve core 1093 is installed inside the valve chamber 1092 of the ball valve 109. The control structure is connected to the valve core 1093 for driving the valve core 1093 to move and open the ball valve 109 when force is applied; the guide pipe 111 is used to discharge the gas in the water pump when the ball valve 109 is opened, and to guide the drainage of the ball valve 109 to the workshop drainage system for discharge; in this way, even if the gas contains water flow, the exhaust through the vent 106 will be discharged through the guide pipe 111 without affecting the junction box 102 of the motor 101, thus protecting the safety of the water pump.

[0032] In fact, the motor 101 and the pump head 107 are connected and fixed by a connecting flange 104 and an end cover 113; a drive shaft hole 115 is provided in the middle of the connecting flange 104 and the end cover 113, through which the output end of the motor can pass; in addition, a sealed bearing can be installed in the drive shaft hole 115 for sealing.

[0033] In this embodiment, a handle 103 is installed on the top of the motor to facilitate the handling and installation of the water pump; the handle 103 allows for convenient handling of the water pump. A mounting base 110 is installed at the bottom of the motor or the bottom of the pump head, or at the bottom of both, to facilitate the fixed installation of the water pump in the corresponding location in the workshop.

[0034] In this embodiment, a valve seat is integrally formed within the valve cavity 1092. A through hole is formed at the center of the valve seat, communicating with the inlet end 108 of the ball valve to form an inlet channel 1091. A second port is formed on the side wall of the valve cavity 1092, constituting an outlet channel 1097. A guide pipe 111 is connected to the second port. The top wall of the valve cavity 1092 can be sealed by a valve cover. A valve core 1093 is coaxially mounted with the through hole. A valve stem 1095 is connected to the valve core 1093, and a sealing ring is installed on the outer circumferential surface of the valve stem 1095. The sealing ring mainly seals the space between the valve cavity 1092 and the valve cover. A mounting hole is formed at the top of the valve stem 1095, and a spring 1094 is installed in the mounting hole. The top of the spring 1094 abuts against the top wall (valve cover) of the valve cavity 1092. The elastic force of the spring 1094 causes the valve core 1093 to abut against the valve seat and seal the through hole. During operation, the gas accumulated inside the pump (inner cavity 116 of the pump head) continuously increases, causing the air pressure at the vent 106 to also continuously increase. As the air pressure increases, the pressure continuously overcomes the force of the spring 1094 and pushes the valve core 1093 back. When the gas accumulates to a certain amount, the resulting pressure will completely overcome the spring 1094 and push open the valve core 1093, allowing the gas to be released.

[0035] In this embodiment, as Figure 6 As shown, the control structure includes a float valve 118, a limit bracket is installed on the vent 106, the float valve 118 is suspended on the side of the vent 106 away from the ball valve 109 by the valve core push rod 119, and the float valve 118 can move in the vertical direction, and the top of the valve core push rod 119 abuts against the valve core 1093.

[0036] The limiting bracket restricts the radial displacement of the valve core push rod 119. A shoulder is provided in the middle of the valve core push rod 119, which, along with the valve core 10963 and the limiting bracket, limits the axial displacement of the valve core push rod 119, allowing it to move up and down within a certain stroke. The contact method between the valve core push rod 119 and the valve core 1093 allows the valve core push rod 119 to push the valve core 1093 upwards without causing it to move downwards. The float valve 118 does not seal the vent port 106. When the gas in the pump head cavity 116 increases, the increased gas pressure causes the float valve 118 to rise. The float valve 118 pushes open the valve core 1093 via the valve core push rod 119, achieving venting. After venting, the gas in the pump head cavity 116 decreases, the float valve 118 descends, and the valve core 1093 descends to close the through hole.

[0037] In fact, an arc-shaped surface 120 is formed on the inner wall of the pump head 107 near the drain port 106, and the float valve 118 is a hemispherical structure with a round upper surface and a flat lower surface; the radius of the arc-shaped surface 120 is larger than the radius of the float valve 118. Thus, the contact area between the lower surface of the float valve 118 and the gas inside the pump is greater than the contact area between the bottom of the valve core 1093 and the gas inside the pump. This allows the increase in gas in the pump head cavity 116 to better drive the float valve 118.

[0038] In fact, there are fine grooves machined on the arc surface 120. The fine grooves serve to guide the flow and air, avoiding the possibility that the float valve 118 may block the vent 106.

[0039] In this embodiment, a control port is provided on the top outer side of the valve cavity 1092, and a threaded hole is provided on the top of the valve stem 1095 corresponding to the control port. A countersunk stud 1096 is installed in the threaded hole. The control structure includes a hinge lug and a handle 112. The hinge lug is fixedly set on the outer edge of the control port. One end of the handle 112 is hinged to the hinge lug via a hinge shaft 117. A protrusion extends from the end of the handle 112 near the countersunk stud 1096, extending into the countersunk hole of the countersunk stud 1096 and overlapping with the countersunk stud 1096. The other end of the handle 112 is set as a free end. By pressing down the free end, the handle 112 can be rotated, thereby prying the protrusion and pushing the countersunk stud 1096 upward, causing the valve stem 1095 to move the valve core 1093 upward, thus opening the through hole for venting. Conversely, the through hole is closed.

[0040] In fact, the control structure also includes a timer and a servo motor electrically connected to the timer. The servo motor is mounted on the water pump, specifically on the pump head 107. The output end of the servo motor is connected to the free end of the handle 112. The timer is used to periodically power on the servo motor, which drives the handle 112 to rotate. The rotation of the handle pushes the valve core 1093 to open the through hole. In this way, the gas in the pump head cavity 116 is vented.

[0041] In another embodiment, such as Figure 1 As shown, a water pump includes a motor 101, a pump head 107, and a splash-proof venting device for the water pump. The motor 101 is fixedly connected to the pump head 107, and an impeller is provided inside the pump head 107. The impeller is connected to the output end of the motor. The pump head 107 has an inlet 108, an outlet 105, and a vent 106. The splash-proof venting device for the water pump is installed in the vent 106.

[0042] In this embodiment, during the operation of the water pump, the gas inside the pump head cavity 116 is vented through the vent port 106. The guide pipe 111 directs the water to the workshop drainage system, which consists of several drainage ditches distributed on the workshop floor, thus preventing water splashing. This avoids the junction box 102 of the motor 101 being splashed by the vented water, reducing safety risks.

[0043] In fact, the float valve 118 and the ball valve 109 are linked for automatic gas venting, thus reducing water pump cavitation. Furthermore, manual venting can also be achieved quickly via handle 112, eliminating the need to remove the threaded plug from the water pump's vent port with tools.

[0044] In practice, a check valve 114 can also be installed at the outlet 105 as needed in this embodiment. The check valve 114 can prevent backflow of water when the water pump stops running, and is highly practical.

[0045] The above provides a detailed description of the anti-splash and venting device for water pumps and the water pump itself, as provided by this utility model. The specific embodiments are described only to aid in understanding the method and core concept of this utility model. It should be noted that those skilled in the art can make various improvements and modifications to this utility model without departing from its principles, and these improvements and modifications also fall within the protection scope of the claims of this utility model.

Claims

1. A splash-proof venting device for a water pump, installed at the vent (106) of the water pump, for venting the water pump; characterized in that, The device includes a ball valve (109), a guide pipe (111), and a control structure. The drain port (106) is provided with an internal thread. The inlet end of the ball valve (109) is provided with a threaded part. The ball valve (109) is installed in the drain port (106) through the threaded part and the internal thread. The outlet end of the ball valve (109) is connected to one end of the guide pipe (111), and the other end of the guide pipe (111) extends to the workshop drainage system. A valve core (1093) is provided in the valve chamber (1092) of the ball valve (109). The control structure is drivenly connected to the valve core (1093) and is used to drive the valve core (1093) to move and open the ball valve (109) after being subjected to force. The guide pipe (111) is used to discharge the gas in the water pump when the ball valve (109) is opened, and to guide the drainage of the ball valve (109) to the workshop drainage system for discharge.

2. The anti-splash and venting device for water pumps according to claim 1, characterized in that, A valve seat is integrally provided inside the valve cavity (1092). A through hole is provided in the center of the valve seat. The through hole is connected to the water inlet end of the ball valve. The valve core (1093) is coaxially installed with the through hole. The valve core (1093) is connected to a valve stem (1095). A sealing ring is installed on the outer circumferential surface of the valve stem (1095). An installation hole is provided at the top of the valve stem (1095). A spring (1094) is installed in the installation hole. The top of the spring (1094) abuts against the top wall of the valve cavity (1092).

3. The anti-splash and venting device for water pumps according to claim 2, characterized in that, A control port is provided on the top outer side of the valve cavity (1092), and a threaded hole is provided on the top of the valve stem (1095) on the side corresponding to the control port. A countersunk stud (1096) is installed in the threaded hole. The control structure includes a hinge lug and a handle (112). The hinge lug is fixedly provided on the outer edge of the control port. One end of the handle (112) is hinged to the hinge lug. A protrusion is provided on one end of the handle (112) near the countersunk stud (1096). The protrusion overlaps with the countersunk stud (1096). The other end of the handle (112) is set as a free end.

4. The anti-splash and venting device for water pumps according to claim 3, characterized in that, The control structure also includes a float valve (118), a limit frame is installed in the vent (106), the float valve (118) is suspended on the side of the vent (106) away from the ball valve (109) by a valve core push rod (119), and the float valve (118) can move in the vertical direction, and the top of the valve core push rod (119) abuts against the valve core (1093).

5. The anti-splash and venting device for water pumps according to claim 4, characterized in that, The pump head (107) of the water pump has an arc-shaped surface (120) on the inner wall near the drain port (106), and the float valve (118) is a hemispherical structure with a round upper part and a flat lower part; the radius of the arc-shaped surface (120) is greater than the radius of the float valve (118).

6. The anti-splash and venting device for water pumps according to claim 3, characterized in that, The control structure also includes a timer and a servo motor electrically connected to the timer. The servo motor is installed on the water pump, and the output end of the servo motor is connected to the free end of the handle (112). The timer is used to periodically power on the servo motor, and the servo motor drives the handle (112) to rotate. The rotation of the handle pushes the valve core (1093) to open the through hole.

7. A water pump, characterized in that, It includes a motor, a pump head (107), and a water pump anti-splash venting device as described in any one of claims 1-6; the motor is fixedly connected to the pump head (107), an impeller is provided inside the pump head (107), and the impeller is connected to the output end of the motor; the water pump anti-splash venting device is installed at the venting port (106) of the pump head (107).

8. The water pump according to claim 7, characterized in that, The outlet (105) of the pump head (107) is equipped with a check valve.

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