Waterproof hammer structure of pre-filter

Abstract

The utility model relates to the technical field of water conservancy and hydropower engineering, in particular to a waterproof hammer structure of a pre-filter, which comprises a piston, the piston is of a hollow structure and is divided into a piston body upper part and a piston body lower part, the piston body upper part is arranged in a filter bottle of the pre-filter, the piston body lower part penetrates out of an opening at the lower end of the filter bottle, and an external thread is arranged at the end part of the piston body lower part; the outer side of the lower part of the piston body is sleeved with a spring; the piston can axially move along the opening of the filter bottle; the blow-down valve comprises a connecting pipe, a ball valve structure and a nozzle, one end of the connecting pipe is provided with internal threads, the other end of the connecting pipe is provided with a clamping groove, the ball valve structure is arranged in the connecting pipe, the nozzle is clamped with the clamping groove, and the internal threads of the connecting pipe can be in threaded connection with the external threads arranged at the end of the lower portion of the plug body. According to the utility model, the piston and the blow-down valve are arranged at the lower part of the pre-filter, so that the water hammer prevention effect can be achieved, the filter material in the filter bottle can be cleaned by opening the drain valve, the structure is simple, and the operation is convenient.

Description

Technical Field

[0001] The utility model relates to the technical field of water conservancy and hydropower engineering, in particular to a water hammer prevention structure of a pre-filter. Background Art

[0002] In daily life, sudden power outages or when valves are closed too quickly often cause water shock waves to be generated due to the inertia of the pressurized water flow, just like a hammer hitting a wall. This phenomenon is called the water hammer effect. The water hammer effect is extremely destructive. For example, if the pressure is too high, the pipe will rupture. On the contrary, if the pressure is too low, the pipe will collapse and the valves and fixings will be damaged. In order to deal with this phenomenon, anti-hammer devices have been invented in the prior art to deal with the water hammer effect. In the prior art, anti-hammer devices are often connected to pre-filters, which can prevent water hammer and filter water at the same time. The pre-filter is a coarse filtration device, which is mainly used to filter coarse particles, sand and rust in tap water that are harmful to household water pipes and water-related equipment.

[0003] Chinese patent publication number: CN218687160U, discloses a pre-filter to prevent water hammer. The technical core of this utility model is to effectively combine the water hammer device with the screw assembly for controlling sewage discharge. The opening / closing of the sewage outlet can be controlled by rotating the water hammer device. It is not only easy to operate, but also reduces the risk of leakage between the valve head and the filter bottle by adding the water hammer device. However, this structure requires unscrewing the piston to discharge sewage, which is relatively complicated and not conducive to cleaning the filter device. Moreover, due to the frequent rotation and opening of the water hammer device, the air tightness of the water hammer device will deteriorate, affecting the water hammer effect. Summary of the invention

[0004] To this end, the present invention provides a pre-filter anti-hammer structure to solve the problem in the above-mentioned prior art that when cleaning the pre-filter, the anti-hammer device needs to be unscrewed, which is complicated to operate and causes the air tightness of the anti-hammer device to deteriorate, thus affecting the anti-hammer effect.

[0005] To achieve the above object, the present invention provides a water hammer prevention structure for a pre-filter, the structure comprising:

[0006] The piston is a hollow structure, and is divided into an upper plug body and a lower plug body. The upper plug body is placed in the filter bottle of the pre-filter, and the lower plug body passes through the lower opening of the filter bottle. The end of the lower plug body is provided with an external thread, and the outer side of the lower plug body is provided with a spring, so that the piston can move along the axial direction of the filter bottle opening;

[0007] The sewage valve includes a connecting pipe with an internal thread at one end and a groove at the other end, a ball valve structure arranged inside the connecting pipe, and a nozzle engaged with the groove. The internal thread of the connecting pipe can be threadedly connected with the external thread arranged at the end of the lower part of the plug body.

[0008] In one achievable manner, the anti-water hammer structure of the pre-filter further includes a lower cover assembly, which is a hollow cylindrical structure, and the lower cover assembly is detachably connected to the filter bottle.

[0009] In one practicable manner, an adjusting knob is disposed on the outer side of the lower cover assembly, and the adjusting knob is connected to the ball valve structure through a connecting rod, so as to control the opening or closing of the ball valve structure by rotation.

[0010] In one practicable manner, an annular support portion is further provided on the inner wall of the lower cover assembly, a circular through hole is provided at the center of the annular support portion, and a connecting pipe is placed in the circular through hole to fix the drain valve in radial direction.

[0011] In one achievable manner, the upper part and the lower part of the plug body are both tubular bodies, and the outer diameter of the upper part of the plug body is larger than the diameter of the filter bottle opening, and the outer diameter of the lower part of the plug body is smaller than the diameter of the filter bottle opening.

[0012] In one achievable manner, the inner diameter of the upper portion of the plug body is greater than the inner diameter of the lower portion of the plug body.

[0013] In one achievable manner, a plurality of annular grooves are arranged on the outer side of the upper portion of the plug body, and an O-ring is arranged in any annular groove, wherein the annular grooves have the same size.

[0014] In one feasible method, the outer diameter of the connecting tube is higher than the diameter of the filter bottle opening. When the connecting tube is connected to the piston, both ends of the spring are squeezed by the upper bottom filter bottle and the inner wall of the lower opening, so that the upper end surface of the connecting tube is separated from the filter bottle opening.

[0015] In one feasible manner, the connecting pipe is divided into a main body and a fixing portion. The main body is provided with a placement groove for placing the ball valve structure. The fixing portion is connected to the placement groove of the main body through a thread to fix the nozzle.

[0016] In one achievable manner, the nozzle includes a nozzle body, an elastic fixing ring, and an annular fixing buckle.

[0017] The nozzle body is placed in the slot of the connecting pipe, the elastic fixing ring can be engaged in the slot of the connecting pipe to squeeze and fix the nozzle body, and the annular fixing buckle can be inserted into the inner side of the elastic fixing ring to support the elastic fixing ring.

[0018] Compared with the prior art, the present application uses a new type of spring to effectively solve the water hammer effect by setting a spring on the side wall of the piston. At the same time, the interior of the piston is a hollow structure, and water can pass through it. A drain valve is set at the lower part of the plug body. When the pre-filter needs to be cleaned, the drain valve is opened, and water can pass through the piston and the drain valve. When the cleaning is completed, the drain valve is closed to form a closed chamber. The whole structure constitutes an anti-water hammer structure, which effectively copes with the water hammer effect. Compared with the prior art in which the piston must be unscrewed to clean and drain the pre-filter, this structure has the characteristics of simple operation and better anti-water hammer effect.

[0019] Furthermore, by arranging a lower cover assembly at the lower part of the filter bottle, the piston, the spring and the drain valve can be protected. At the same time, the lower cover assembly is detachably connected, has the characteristics of beautiful appearance and easy disassembly.

[0020] Furthermore, by arranging an adjusting knob on the lower cover assembly and connecting the adjusting knob to the ball valve structure inside the drain valve by means of a connecting rod, the drain valve can be opened and stopped conveniently, saving effort.

[0021] Furthermore, by arranging an annular support portion on the inner wall of the lower cover assembly, a circular through hole is arranged in the center of the annular support portion, and a connecting pipe is placed in the circular through hole, the drain valve can be radially supported and fixed. When a water hammer effect occurs, the drain valve will swing left and right, damaging the piston, drain valve and other internal components.

[0022] Furthermore, by setting the outer diameter of the upper part of the piston plug body to be larger than the diameter of the filter bottle opening, it can be prevented that when a water hammer effect occurs, the upper part of the plug body compresses the spring and causes the piston to separate from the filter bottle body. By setting the outer diameter of the lower part of the plug body to be smaller than the diameter of the filter bottle opening, when the upper part of the plug body squeezes the spring, the lower part of the plug body can extend out of the filter bottle opening, thereby realizing radial movement of the piston along the filter bottle opening.

[0023] Furthermore, the inner diameter of the upper part of the plug body is larger than the inner diameter of the lower part of the plug body to form a tube channel, and the water body is gathered to increase the water pressure. The water body can pass through it, so that a passage is formed between the piston and the internal pipeline of the drain valve. The pre-filter can be cleaned and drained without unscrewing the piston. It has the characteristics of simple structure, time saving and labor saving.

[0024] Furthermore, by arranging an annular groove on the upper part of the plug body and arranging an O-ring in the annular groove, a drainage sealing effect can be achieved for the piston.

[0025] Furthermore, by setting the outer diameter of the connecting tube to be higher than the diameter of the filter bottle opening, the connecting tube and the piston can be connected as one, and the whole can move radially along the filter bottle opening.

[0026] Furthermore, by configuring the connecting pipe as a main body and a fixed body, the specific function of the connecting pipe can be distinguished. A placement groove is provided in the main body for placing the ball valve structure. A fixed part is threadedly connected to the lower part of the main body to fix the nozzle. The device is simple, detachable, and easy to replace.

[0027] Furthermore, by arranging the nozzle body, the elastic fixing ring and the annular fixing opening on the nozzle, the nozzle body can be fixed, and the elastic fixing ring can also protect the nozzle body. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 This is a schematic diagram of the structure of the anti-water hammer structure of the pre-filter of the present application;

[0029] Figure 2 This is an overall schematic diagram of the following parts of the filter bottle of this application;

[0030] Figure 3 A longitudinal cross-sectional view of the piston of the present application;

[0031] Figure 4 A longitudinal cross-sectional view of the sewage valve of this application;

[0032] Figure 5 This is a longitudinal cross-sectional view of the nozzle of this application. DETAILED DESCRIPTION

[0033] In order to make the objects and advantages of the present invention more clearly understood, the present invention is further described below in conjunction with embodiments; it should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0034] The preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only used to explain the technical principles of the present invention and are not intended to limit the protection scope of the present invention.

[0035] It should be noted that, in the description of the present invention, terms such as "up", "down", "left", "right", "inside" and "outside" indicating directions or positional relationships are based on the directions or positional relationships shown in the drawings. This is merely for the convenience of description and does not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it cannot be understood as a limitation on the present invention.

[0036] In addition, it should be noted that in the description of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0037] In order to solve the above technical problems, the utility model provides a pre-filter anti-water hammer structure. Figure 1 A schematic diagram of the structure is shown in FIG. Figure 1 As shown, the anti-water hammer structure of the pre-filter includes a valve body assembly 11, a filter element assembly 12, a filter bottle 13, a piston 14, an O-ring 15, a spring 16, a drain valve 17 and a lower cover assembly 18.

[0038] The valve body assembly 11 has a water outlet and a water inlet on both sides, each of which has a protruding thread structure for detachably connecting the water inlet pipe and the water outlet pipe, and an internal threaded port and an external threaded port are respectively provided at the lower end of the valve body assembly 11. In an achievable manner, a pressure water meter is provided at the upper part of the valve body assembly 11 for monitoring the water pressure.

[0039] The filter element assembly 12 may be provided with, but is not limited to, activated carbon, filter cotton and other materials for water filtering, wherein one end of the filter element assembly 12 may have a protruding threaded structure that can be detachably connected to the internal threaded port of the valve body assembly 11 .

[0040] The filter bottle 13 has a filter element assembly 12, one end of the filter bottle 13 has a threaded structure, which can be detachably connected to the external threaded port of the valve body assembly 11, and the other end of the filter bottle 13 has a detachable connection mechanism. Exemplarily, Figure 2 A longitudinal cross-sectional view of the part below the filter bottle 13 is shown, as shown in FIG. Figure 2 As shown, it includes an air chamber 171, a connecting pipe 172 and a nozzle 173. The lower part of the filter bottle 13 has Figure 2 The air chamber 171 shown has air inside, which can be used to compress the air during the water hammer process to play a buffering role.

[0041] The piston 14 is a hollow structure and is placed in the air chamber 171. The piston 14 is divided into Figure 3The upper plug part 141 and the lower plug part 142 are shown, the upper plug part 141 is placed in the filter bottle of the pre-filter, the lower plug part 142 passes through the lower end opening of the filter bottle, and the end of the lower plug part 142 is provided with an external thread, the outer surface between the external thread and the upper plug part 141 is a smooth cylindrical, and the smooth cylindrical surface of the outer side of the lower plug part 142 is sleeved with a spring 16, which has a buffering effect and can be used to achieve a water hammer prevention effect, and the piston 14 can move along the axial direction of the filter bottle opening.

[0042] The drain valve 17 includes a drain valve 17 having an internal thread at one end and a drain valve 17 having an internal thread at the other end. Figure 2 The connecting pipe 172 with a slot is provided inside the connecting pipe 172. Figure 1 The ball valve structure 174 and the nozzle 173 engaged with the slot, the internal thread of the connecting pipe 172 can be threadedly connected with the external thread set at the end of the plug body lower part 142. Among them, the outer side of the drain valve 17 has a convex structure, which is a valve that can control the opening and closing of the drain valve 17.

[0043] Specifically, the water hammer effect is effectively solved by arranging a spring 16 on the side wall of the piston 14. At the same time, the interior of the piston 14 is a hollow structure, and water can pass through it. A drain valve 17 is arranged at the lower part of the piston 14. When the pre-filter needs to be cleaned, the drain valve 17 is opened, and water can pass through the piston 14 and the drain valve 17. When the cleaning is completed, the drain valve 17 is closed to form a closed chamber. The whole structure constitutes an anti-water hammer structure, which effectively copes with the water hammer effect. Compared with the prior art in which the piston 14 must be unscrewed before the pre-filter can be cleaned and drained, this structure has the characteristics of simple operation and better anti-water hammer effect.

[0044] In one feasible manner, the water hammer prevention structure of the pre-filter also has a lower cover assembly 18, which is a hollow cylindrical structure, and one end of the mouth has an internal thread, and the internal thread can be detachably connected to the detachable connecting mechanism of the filter bottle 13. For example, the detachable connection can be but is not limited to a snap connection, a threaded connection, etc.

[0045] Specifically, by setting a lower cover assembly 18 at the lower part of the filter bottle 13, the piston 14, the spring 16 and the drain valve 17 can be protected. At the same time, the lower cover assembly 18 is detachably connected to the filter bottle 13, which has the characteristics of beautiful appearance and easy disassembly.

[0046] In one practicable manner, the outer side of the lower cover assembly 18 is provided with Figure 1 The adjusting knob 181 shown is connected to the ball valve structure 174 via a connecting rod, so as to control the opening or closing of the ball valve structure 174 by rotation.

[0047] Specifically, by providing an adjusting knob 181 on the lower cover assembly 18 and connecting the adjusting knob 181 to the ball valve structure 174 inside the drain valve 17 via a connecting rod, the drain valve 17 can be opened and stopped conveniently, saving effort.

[0048] In one practicable manner, the inner wall of the lower cover assembly 18 is also provided with Figure 2 The annular support portion 182 shown has a circular through hole at its center, and the connecting pipe 172 is placed in the circular through hole to fix the drain valve 17 in the radial direction. In addition, the lower cover assembly 18 wraps the drain valve 17, the piston 14, and the spring 16, and also has the function of protecting the drain valve 17, the piston 14, the spring 16 and other internal components.

[0049] Specifically, by setting the inner wall of the lower cover assembly 18 as follows Figure 2 The annular support portion 182 shown has a circular through hole in the center, and the connecting pipe 172 is placed in the circular through hole, which can radially support and fix the drain valve 17. When the water hammer effect occurs, the drain valve 17 swings left and right, damaging the piston 14, the drain valve 17 and other internal components.

[0050] In one achievable manner, the plug body upper portion 141 and the plug body lower portion 142 are both tubular bodies, and the outer diameter of the plug body upper portion 141 is larger than the diameter of the filter bottle opening, and the outer diameter of the plug body lower portion 142 is smaller than the diameter of the filter bottle opening.

[0051] Specifically, by setting the outer diameter of the upper part 141 of the plug body of the piston 14 to be larger than the diameter of the filter bottle opening, it is possible to prevent the upper part 141 of the plug body from compressing the spring 16 and causing the piston 14 to separate from the filter bottle body when a water hammer effect occurs. By setting the outer diameter of the lower part 142 of the plug body to be smaller than the diameter of the filter bottle opening, when the upper part 141 of the plug body squeezes the spring 16, the lower part 142 of the plug body can extend out of the filter bottle opening, thereby realizing the radial movement of the piston 14 along the filter bottle opening.

[0052] In one achievable manner, the inner diameter of the plug body upper portion 141 is greater than the inner diameter of the plug body lower portion 142 .

[0053] Specifically, the inner diameter of the upper part 141 of the plug body is larger than the inner diameter of the lower part 142 of the plug body, so as to form a tube channel, gather water and increase the water pressure. Water can pass through it, so that the piston 14 and the internal pipeline of the drain valve 17 form a passage. The pre-filter can be cleaned and drained without unscrewing the piston 14, which has the characteristics of simple structure, time saving and labor saving.

[0054] In one practicable manner, the outer side of the plug body upper portion 141 is provided with Figure 3There are several annular grooves 1411 shown, each of which has an O-ring 15 disposed therein, wherein the annular grooves 1411 have the same size.

[0055] Specifically, further, by providing an annular groove 1411 on the upper portion 141 of the plug body and providing an O-ring in the annular groove 1411 , a drainage seal effect can be achieved for the piston 14 .

[0056] In one practicable manner, the outer diameter of the connecting tube 172 is greater than the diameter of the filter bottle opening. When the connecting tube 172 is connected to the piston 14, the bottom surface of the upper part 141 of the plug body at both ends of the spring 16 is in contact with the bottom surface of the upper part 141 of the plug body. Figure 1 The inner wall 1711 at the opening of the lower end of the filter bottle is squeezed so that the upper end surface of the connecting tube 172 is away from the opening of the filter bottle.

[0057] Specifically, by setting the outer diameter of the connecting tube 172 to be higher than the diameter of the filter bottle opening, the connecting tube 172 and the piston 14 can be connected as a whole, and the whole can move radially along the filter bottle opening.

[0058] In one achievable approach, Figure 4 A longitudinal cross-sectional view of the connecting pipe 172 is shown. Figure 4 As shown, the connecting pipe 172 is divided into a main body 1721 and a fixing portion 1722. A placement groove is provided in the main body 1721 for placing the ball valve structure 174. The fixing portion 1722 is connected to the placement groove of the main body 1721 through threads to fix the ball valve structure 174.

[0059] Specifically, by setting the connecting pipe 172 as a main body 1721 and a fixed body 1722, the specific function of the connecting pipe 172 can be distinguished. A placement groove is set in the main body 1721 for placing the ball valve structure 174. A fixing part 1722 is threadedly connected to the lower part of the main body 1721 to fix the nozzle 173. The device is simple, detachable, and easy to replace.

[0060] In one achievable approach, Figure 5 A longitudinal cross-sectional view of the nozzle 173 is shown. Figure 5 As shown, the nozzle 173 includes a nozzle body 1731, an elastic fixing ring 1732, and an annular fixing buckle 1733.

[0061] The nozzle 173 body is placed in the slot of the fixing portion 1722 of the connecting tube 172 , the elastic fixing ring 1732 can be engaged in the slot of the connecting tube 172 and squeeze the nozzle 173 body to fix it, and the annular fixing buckle 1733 can be plugged into the inner side of the elastic fixing ring 1732 to support the elastic fixing ring 1732 .

[0062] Specifically, by arranging the nozzle body 1731 , the elastic fixing ring 1732 and the annular fixing opening 1733 on the nozzle 173 , the nozzle body 1731 can be fixed, and the elastic fixing ring 1732 can also protect the nozzle body 1731 .

[0063] Water enters from the side wall of the pre-filter. Due to the narrow side wall channel and the high pressure, water can pass through the pre-filter to achieve the filtering effect. A piston and a spring are arranged at the lower part of the pre-filter to prevent water hammer. When the water hammer effect occurs, the shock wave is transmitted into the filter bottle 13, and the shock wave acts on the piston 14. The piston 14 will move toward the drain valve 17. The movement stroke of the piston 14 is related to the spring 16 in the air chamber 173 and the size of the shock wave. Under the dual action of gas at a certain pressure and irregular water hammer, the piston 14 compresses the air in the spring and the air chamber 173 and moves up and down, thereby effectively eliminating irregular water hammer wave oscillations.

[0064] So far, the technical solutions of the present invention have been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it is easy for those skilled in the art to understand that the protection scope of the present invention is obviously not limited to these specific embodiments. Without departing from the principle of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will fall within the protection scope of the present invention.

[0065] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A water hammer prevention structure for a pre-filter, characterized in that: include, The piston is a hollow structure, and is divided into an upper plug body and a lower plug body. The upper plug body is placed in the filter bottle of the pre-filter, and the lower plug body passes through the lower opening of the filter bottle. The end of the lower plug body is provided with an external thread, and the outer side of the lower plug body is provided with a spring, so that the piston can move along the axial direction of the filter bottle opening; The sewage valve comprises a connecting pipe with an internal thread at one end and a slot at the other end, a ball valve structure arranged inside the connecting pipe and a nozzle engaged with the slot. The internal thread of the connecting pipe can be threadedly connected with the external thread arranged at the end of the lower part of the plug body.

2. The anti-water hammer structure of the pre-filter according to claim 1, characterized in that: It also includes a lower cover assembly, which is a hollow cylindrical structure and is detachably connected to the filter bottle.

3. The anti-water hammer structure of the pre-filter according to claim 2, characterized in that: An adjusting knob is arranged on the outer side of the lower cover assembly, and the adjusting knob is connected to the ball valve structure through a connecting rod, so as to control the opening or closing of the ball valve structure through rotation.

4. The anti-water hammer structure of the pre-filter according to claim 2, characterized in that: The inner wall of the lower cover assembly is also provided with an annular support portion, the center of the annular support portion is provided with a circular through hole, and the connecting pipe is placed in the circular through hole to fix the radial direction of the sewage valve.

5. The anti-water hammer structure of the pre-filter according to claim 1, characterized in that: The upper part of the plug body and the lower part of the plug body are both tubular bodies, and the outer diameter of the upper part of the plug body is larger than the diameter of the filter bottle opening, and the outer diameter of the lower part of the plug body is smaller than the diameter of the filter bottle opening.

6. The anti-water hammer structure of the pre-filter according to claim 1, characterized in that: The inner diameter of the upper part of the plug body is greater than the inner diameter of the lower part of the plug body.

7. The anti-water hammer structure of the pre-filter according to claim 1, characterized in that: A plurality of annular grooves are arranged on the outer side of the upper part of the plug body, and an O-ring is arranged in any of the annular grooves, wherein the annular grooves have the same size.

8. The anti-water hammer structure of the pre-filter according to claim 1, characterized in that: The outer diameter of the connecting tube is higher than the diameter of the filter bottle opening. When the connecting tube is connected to the piston, both ends of the spring are squeezed by the bottom surface of the upper part of the plug body and the inner wall of the lower opening of the filter bottle, so that the upper end surface of the connecting tube is away from the filter bottle opening.

9. The anti-water hammer structure of the pre-filter according to claim 1, characterized in that: The connecting pipe is divided into a main body and a fixing part. The main body is provided with a placement groove for placing a ball valve structure. The fixing part is connected to the placement groove through a thread to fix the ball valve structure.

10. The anti-water hammer structure of the pre-filter according to claim 1, characterized in that: The nozzle comprises a nozzle body, an elastic fixing ring, and an annular fixing buckle. The nozzle body is placed in the slot of the connecting tube, the elastic fixing ring can be engaged in the slot of the connecting tube to squeeze and fix the nozzle body, and the annular fixing buckle can be plugged into the inner side of the elastic fixing ring to support the elastic fixing ring.

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