Pre-filter device for water pump

Abstract

The present invention relates to the technical field of pre-filtering for thermal power generation, in particular to a pre-filter device for a water pump. The pre-filter device comprises: a filter assembly, which comprises filters and connecting pipes mounted on two sides of the filters, wherein valves are mounted at the ends of the two connecting pipes, the valves are controlled by means of first gears, and a main pipe is mounted at the ends of the connecting pipes; and driving assemblies, which comprise a connecting support mounted on the side wall of the main pipe, wherein a first driving frame and a second driving frame are respectively connected to the upper and lower sides of the connecting support, and the first driving frame and the second driving frame are each connected to a connecting shaft by means of a toothed block and a gear. By designing the two filters and the corresponding driving assemblies, the filters can be cleaned and maintained without shutting down a water pump, thereby ensuring the normal operation of a thermal power generation device, and avoiding production interruption caused by a shutdown.

Description

A pre-filter for a water pump Technical Field

[0001] This invention relates to the field of pre-filtration technology for thermal power generation, and more particularly to a pre-filtration device for water pumps. Background Technology

[0002] Pre-filters for water pumps in thermal power plants are primarily used to remove impurities from the water, protecting pumps and related equipment and ensuring the normal operation of the power plant. Specifically, the main functions of a pre-filter include: effectively removing impurities and particles such as silt, leaves, and weeds from the water, preventing these impurities from entering the pumps and pipes and causing blockages and damage; preventing impurities from causing friction and wear on the pump blades and bearings, thereby extending the pump's service life; protecting sensitive equipment such as boilers and heat exchangers from the effects of impurities and particles in the water, preventing equipment damage, and ensuring the normal operation of the thermal power plant; and ensuring that the water quality meets certain standards, guaranteeing the normal operation of subsequent treatment equipment and improving overall water treatment efficiency.

[0003] While existing pre-filters for water pumps have addressed some of the aforementioned issues, they still have shortcomings in actual operation: if the pre-filter is not cleaned for an extended period, accumulated impurities may breed bacteria, viruses, and other microorganisms, causing secondary pollution of the water. Therefore, to ensure the filtration effect of the pre-filter and extend its service life, it needs to be cleaned regularly. However, cleaning and maintenance of existing pre-filters for water pumps requires stopping the water pump, which can affect the normal operation of thermal power generation units and lead to production interruptions. Summary of the Invention

[0004] The purpose of this section is to outline some aspects of embodiments of the present invention and to briefly describe some preferred embodiments. Simplifications or omissions may be made in this section, as well as in the abstract and title of this application, to avoid obscuring the purpose of these documents; however, such simplifications or omissions should not be construed as limiting the scope of the invention.

[0005] In view of the problem that the water pump must be stopped when the pre-filter is cleaned and maintained, which will affect the normal operation of the thermal power plant and cause production interruption, the present invention is proposed.

[0006] Therefore, the purpose of this invention is to provide a pre-filter for a water pump.

[0007] To solve the above-mentioned technical problems, the present invention provides the following technical solution: a pre-filter for a water pump, comprising a filter assembly including a filter, connecting pipes installed on both sides of the filter, valves installed at the ends of the two connecting pipes, the valves being controlled by a first gear, and a main pipe installed at the end of each connecting pipe; and...

[0008] The drive assembly includes a connecting bracket mounted on the side wall of the main pipe. The connecting bracket connects a first drive frame and a second drive frame to its upper and lower sides, respectively. The first drive frame and the second drive frame are connected to the connecting shaft via a gear and a toothed block, respectively. The first drive frame and the second drive frame are connected to the valves on both sides of the filter via a rack and a first gear, respectively. The racks on the first drive frame and the racks on the second drive frame are staggered. When the connecting shaft rotates, the first drive frame and the second drive frame drive the two valves on both sides of the filter to open and close sequentially.

[0009] In a preferred embodiment of the water pump pre-filter device of the present invention, the connecting bracket includes a bearing seat disposed on the side wall of the connecting shaft, a fixing ring is installed on the side wall of the bearing seat, the fixing ring is sleeved on the side wall of the main pipe, and a worm gear seat is installed at the top of the fixing ring.

[0010] As a preferred embodiment of the water pump pre-filter device of the present invention, wherein: the first drive frame includes a first drive frame arc disposed on the side wall of the filter, a first drive rack is installed at both ends of the first drive frame arc, and a first drive slide is installed at the end of one of the first drive racks.

[0011] As a preferred embodiment of the water pump pre-filter device of the present invention, the second drive frame includes a second drive frame arc disposed at the bottom end of the first drive frame arc, and a second drive rack is installed at both ends of the second drive frame arc. A second tooth block is disposed on one side of the second drive rack, and the second tooth block is opposite in direction to the second drive rack.

[0012] As a preferred embodiment of the water pump pre-filter device of the present invention, the second drive frame further includes a connecting rod disposed on one side of the second tooth block, the top end of the connecting rod being connected to a groove on the side wall of the bearing seat.

[0013] In a preferred embodiment of the water pump pre-filter device of the present invention, a worm gear is sleeved on the side wall of the connecting shaft, the toothed blocks on the side wall of the worm gear mesh with the toothed blocks on the worm, and the two ends of the worm are installed in the worm seat.

[0014] As a preferred embodiment of the water pump pre-filter device of the present invention, the two ends of the connecting shaft are equipped with driven gears, and the two driven gears respectively mesh with the tooth blocks on the first drive slide and the second tooth block.

[0015] In a preferred embodiment of the water pump pre-filter device of the present invention, the connecting shaft is fixed by a mounting bracket on the bearing seat, and the connecting shaft passes through the fixing ring.

[0016] In a preferred embodiment of the water pump pre-filter device of the present invention, the two first drive racks of the first drive frame and the two second drive racks of the second drive frame are staggered. When the two valves connected to the second drive frame are opened, the two valves connected to the first drive frame are closed. When the two valves connected to the second drive frame are closed, the two valves connected to the first drive frame are opened.

[0017] In a preferred embodiment of the water pump pre-filter device of the present invention, the teeth on the first drive rack and the second drive rack are engaged with the first gear on the valve.

[0018] The beneficial effects of this invention are as follows: By designing two filters and corresponding drive components, this invention enables the cleaning and maintenance of the filters without stopping the water pump, ensuring the normal operation of the thermal power generation unit and avoiding production interruptions caused by shutdowns. The racks of the first and second drive frames are staggered, so that each time the filter's operating state is switched, both filters open simultaneously first, and then one set of valves closes. This design ensures the continuity and stability of water flow during the switching process. Since cleaning and maintenance can be performed without stopping the system, maintenance costs and time costs are greatly reduced, and the overall operating efficiency of the system is improved. The precise cooperation of the worm gear drive and rack and pinion ensures the reliability and stability of the drive components, reducing the probability of mechanical failures. Attached Figure Description

[0019] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the following description of the embodiments will be briefly introduced. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without any creative effort.

[0020] Figure 1 is a schematic diagram of a pre-filter device for a water pump.

[0021] Figure 2 is a schematic diagram of the connection bracket structure of a water pump pre-filter device.

[0022] Figure 3 is a schematic diagram of the first drive frame structure of a water pump pre-filter device.

[0023] Figure 4 is a schematic diagram of the second drive frame structure of a water pump pre-filter device.

[0024] Figure 5 is a schematic diagram of the worm gear connection structure of a water pump pre-filter device.

[0025] Reference numerals: 100, Filter assembly; 101, Filter; 102, Connecting pipe; 103, Valve; 104, First gear; 105, Main pipe; 200, Drive assembly; 201, Connecting bracket; 202, First drive frame; 203, Second drive frame; 204, Connecting shaft; 205, Worm gear; 206, Worm; 207, Driven gear; 201a, Bearing seat; 201b, Retaining ring; 201c, Worm seat; 202a, First drive frame arc; 202b, First drive rack; 202c, First drive slide; 203a, Second drive frame arc; 203b, Second drive rack; 203c, Second gear block; 203d, Connecting rod. Detailed Implementation

[0026] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0027] Many specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways different from those described herein, and those skilled in the art can make similar extensions without departing from the spirit of the invention. Therefore, the invention is not limited to the specific embodiments disclosed below.

[0028] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it a single or selective embodiment that is mutually exclusive with other embodiments.

[0029] Secondly, the present invention is described in detail with reference to the schematic diagrams. When detailing the embodiments of the present invention, for ease of explanation, the cross-sectional views illustrating the device structure may be partially enlarged, not according to the usual scale. Furthermore, the schematic diagrams are merely examples and should not limit the scope of protection of the present invention. In addition, actual fabrication should include three-dimensional spatial dimensions of length, width, and depth.

[0030] Example 1, referring to Figures 1 and 2, is the first embodiment of the present invention. This embodiment provides a water pump pre-filter device, which includes a precision mechanical transmission device to achieve cleaning and maintenance of filter 101 without stopping the machine.

[0031] Specifically, the filter assembly 100 includes a filter 101, connecting pipes 102 installed on both sides of the filter 101, valves 103 installed at the ends of the two connecting pipes 102, the valves 103 being controlled by a first gear 104, and a main pipe 105 installed at the ends of the connecting pipes 102.

[0032] Furthermore, the drive assembly 200 includes a connecting bracket 201 mounted on the side wall of the main pipe 105. The connecting bracket 201 is connected to a first drive frame 202 and a second drive frame 203 on its upper and lower sides, respectively. The first drive frame 202 and the second drive frame 203 are connected to the connecting shaft 204 through a gear and a toothed block, respectively. The first drive frame 202 and the second drive frame 203 are connected to the valves 103 on both sides of the filter 101 through a rack and a first gear 104, respectively. The racks on the first drive frame 202 and the second drive frame 203 are staggered. When the connecting shaft 204 rotates, the first drive frame 202 and the second drive frame 203 drive the valves 103 on both sides of the two filters 101 to open and close in sequence.

[0033] Operating Procedure: Filter 101A is in working condition, while filter 101B is in standby condition. Water flows through filter 101A, is purified, and continues to flow. When filter 101A needs cleaning, the operator starts the worm motor via an external controller. The worm motor starts running, driving the worm 206 to rotate. The worm 206 meshes with the turbine 205, causing the turbine 205 to rotate. The turbine 205 is fixed to the connecting shaft 204, which then begins to rotate. The rotation of the connecting shaft 204 drives two driven gears 207 to rotate. The rotation of the driven gears 207, through the meshing first drive slide 202c and second gear block 203c, drives the first drive rack 202b and the second drive rack 203b to move along the slots on the bearing housing 201a, respectively. Because the racks of the first drive rack 202b and the second drive rack 203b are staggered, their directions of movement are opposite. Drive racks 202b and 203b engage with the first gears 104 on the valves 103 on both sides of filter 101. The movement of drive rack 202a first opens two valves 103 of filter 101B and then closes two valves 103 of filter 101A. Water flow smoothly switches from filter 101A to filter 101B, and filter 101A enters a cleaning and maintenance state, while filter 101B continues to operate, ensuring normal system operation. After filter 101A enters the cleaning and maintenance state, operators can clean and maintain it without affecting normal system operation. After cleaning and maintenance, the operator restarts the worm gear motor and repeats the above process to switch water flow from filter 101B back to filter 101A. Filter 101B then returns to standby mode, and the system resumes normal operation.

[0034] Example 2, referring to Figures 2 to 4, is the second embodiment of the present invention. This embodiment differs from the first embodiment in that: since the two racks are staggered and their movement directions are opposite, they control the opening and closing of the valves on both sides of the filter respectively, thereby achieving a smooth switching of water flow.

[0035] Specifically, the connecting bracket 201 includes a bearing seat 201a disposed on the side wall of the connecting shaft 204, a fixing ring 201b installed on the side wall of the bearing seat 201a, the fixing ring 201b being sleeved on the side wall of the main pipe 105, and a worm gear seat 201c installed on the top of the fixing ring 201b.

[0036] Furthermore, the first drive frame 202 includes a first drive frame arc 202a disposed on the side wall of the filter 101, a first drive rack 202b installed at both ends of the first drive frame arc 202a, and a first drive slide 202c installed at the end of one of the first drive racks 202b.

[0037] Furthermore, the second drive frame 203 includes a second drive frame arc 203a disposed at the bottom end of the first drive frame arc 202a. The two ends of the second drive frame arc 203a are equipped with second drive racks 203b. A second tooth block 203c is disposed on one side of the second drive rack 203b. The second tooth block 203c is opposite in direction to the second drive rack 203b.

[0038] Furthermore, the second drive frame 203 also includes a connecting rod 203d disposed on one side of the second tooth block 203c, the top end of the connecting rod 203d being connected to a slot on the side wall of the bearing seat 201a.

[0039] The rest of the structure is the same as in Example 1.

[0040] Operating Procedure: Filter 101A is in working condition, while filter 101B is in standby condition. Water flows through filter 101A, is purified, and continues to flow. When filter 101A needs cleaning, the operator starts the worm motor via an external controller. The worm motor starts running, driving the worm 206 to rotate. The worm 206 meshes with the turbine 205, causing the turbine 205 to rotate. The turbine 205 is fixed to the connecting shaft 204, which then begins to rotate. The rotation of the connecting shaft 204 drives two driven gears 207 to rotate. The rotation of the driven gears 207, through the meshing first drive slide 202c and second gear block 203c, drives the first drive rack 202b and the second drive rack 203b to move along the slots on the bearing housing 201a, respectively. Because the racks of the first drive rack 202b and the second drive rack 203b are staggered, their directions of movement are opposite. Drive racks 202b and 203b engage with the first gears 104 on the valves 103 on both sides of filter 101. The movement of drive rack 202a first opens the two valves 103 of filter 101B and then closes the two valves 103 of filter 101A. Water flow smoothly switches from filter 101A to filter 101B, and filter 101A enters a cleaning and maintenance state, while filter 101B continues to operate, ensuring the normal operation of the system. After filter 101A enters the cleaning and maintenance state, operators can clean and maintain it without affecting the normal operation of the system. After cleaning and maintenance, the operator restarts the worm gear motor and repeats the above process to switch the water flow back from filter 101B to filter 101A.

[0041] Filter 101B then returns to standby mode, and the system resumes normal operation.

[0042] Example 3, referring to Figures 2 to 5, is the third embodiment of the present invention. This embodiment differs from the above embodiments in that the water pump pre-filter can clean and maintain the filter 101 without stopping the water pump, ensuring the normal operation of the thermal power generation unit and improving the system's reliability and maintenance efficiency.

[0043] Specifically, a worm gear 205 is sleeved on the side wall of the connecting shaft 204, and the tooth blocks on the side wall of the worm gear 205 mesh with the tooth blocks on the worm 206, and the two ends of the worm 206 are installed in the worm seat 201c.

[0044] Furthermore, driven gears 207 are installed at both ends of the connecting shaft 204. The two driven gears 207 mesh with the tooth blocks on the first drive slide 202c and the second tooth block 203c, respectively.

[0045] Furthermore, the connecting shaft 204 is fixed by a mounting bracket on the bearing housing 201a, and the connecting shaft 204 passes through the retaining ring 201b.

[0046] Furthermore, the two first drive racks 202b of the first drive frame 202 and the two second drive racks 203b of the second drive frame 203 are staggered. When the two valves 103 connected to the second drive frame 203 are opened, the two valves 103 connected to the first drive frame 202 are closed. When the two valves 103 connected to the second drive frame 203 are closed, the two valves 103 connected to the first drive frame 202 are opened.

[0047] Furthermore, the teeth on the first drive rack 202b and the second drive rack 203b mesh with the first gear 104 on the valve 103.

[0048] The rest of the structure is the same as in Example 2.

[0049] Operating Procedure: Initially, one of the two filters 101 is in operation, and the other is in standby. Assume filter 101A is in operation and filter 101B is in standby. When cleaning and maintenance of filter 101A is required, the operator starts the worm motor via an external controller, which drives the worm 206 to rotate. As the worm 206 rotates, the worm gear 205 meshing with it also rotates. The worm gear 205 is fixed to the connecting shaft 204, so the connecting shaft 204 also begins to rotate. When the connecting shaft 204 rotates, the two driven gears 207 fixed to it also rotate. As the driven gears 207 rotate, they drive the first drive rack 202b and the second drive rack 203b to move along the slots on the bearing housing 201a via the first drive slide 202c and the second gear block 203c meshing with them. Because the racks of drive rack 202b and drive rack 203b are staggered, drive frame arc 202a and drive frame arc 203a move in opposite directions. Drive rack 202b and drive rack 203b mesh with the first gear 104 on the valves 103 on both sides of filter 101, thereby controlling the opening and closing of valves 103.

[0050] When drive frame arc 202a moves, it first opens two valves 103 of filter 101B and then closes two valves 103 of filter 101A. This switches the water flow from filter 101A to filter 101B, and filter 101A enters the cleaning and maintenance state. After filter 101A enters the cleaning and maintenance state, the operator can clean and maintain it, while filter 101B continues to operate to ensure the normal operation of the water pump. After cleaning and maintenance is completed, the operator restarts the worm gear motor and repeats the above process, switching the water flow from filter 101B back to filter 101A, and filter 101B enters the standby state. After cleaning and maintenance is completed, filter 101A resumes operation, filter 101B returns to the standby state, and the system resumes normal operation.

[0051] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A pre-filter for a water pump, characterized in that: include, A filter assembly (100) includes a filter (101), connecting pipes (102) mounted on both sides of the filter (101), valves (103) mounted at the ends of the two connecting pipes (102), the valves (103) being controlled by a first gear (104), and a main pipe (105) mounted at the end of the connecting pipes (102); and, The drive assembly (200) includes a connecting bracket (201) mounted on the side wall of the main pipe (105). The connecting bracket (201) is connected to a first drive frame (202) and a second drive frame (203) on its upper and lower sides, respectively. The first drive frame (202) and the second drive frame (203) are connected to the connecting shaft (204) through a toothed block and a gear, respectively. The first drive frame (202) and the second drive frame (203) are connected to the valves (103) on both sides of the filter (101) through a rack and a first gear (104), respectively. The rack on the first drive frame (202) and the rack on the second drive frame (203) are staggered. When the connecting shaft (204) rotates, the first drive frame (202) and the second drive frame (203) drive the two valves (103) on both sides of the filter (101) to open and close in sequence.

2. The water pump pre-filter device as described in claim 1, characterized in that: The connecting bracket (201) includes a bearing seat (201a) disposed on the side wall of the connecting shaft (204), a fixing ring (201b) is installed on the side wall of the bearing seat (201a), the fixing ring (201b) is sleeved on the side wall of the main tube (105), and a worm gear seat (201c) is installed at the top of the fixing ring (201b).

3. The water pump pre-filter device as described in claim 2, characterized in that: The first drive frame (202) includes a first drive frame arc (202a) disposed on the side wall of the filter (101), and a first drive rack (202b) is installed at both ends of the first drive frame arc (202a), and a first drive slide (202c) is installed at one end of one of the first drive racks (202b).

4. The water pump pre-filter device as described in claim 3, characterized in that: The second drive frame (203) includes a second drive frame arc (203a) disposed at the bottom end of the first drive frame arc (202a). A second drive rack (203b) is installed at both ends of the second drive frame arc (203a). A second tooth block (203c) is disposed on one side of the second drive rack (203b). The direction of the second tooth block (203c) is opposite to that of the second drive rack (203b).

5. The water pump pre-filter device as described in claim 4, characterized in that: The second drive frame (203) also includes a connecting rod (203d) disposed on one side of the second tooth block (203c), the top end of the connecting rod (203d) being connected to a groove on the side wall of the bearing seat (201a).

6. The water pump pre-filter device as described in claim 5, characterized in that: The connecting shaft (204) has a worm gear (205) sleeved on its side wall. The toothed blocks on the side wall of the worm gear (205) mesh with the toothed blocks on the worm (206), and both ends of the worm (206) are installed in the worm seat (201c).

7. The water pump pre-filter device as described in claim 6, characterized in that: Driven gears (207) are installed at both ends of the connecting shaft (204), and the two driven gears (207) mesh with the first drive slide (202c) and the second tooth block (203c) respectively.

8. The water pump pre-filter device as described in claim 7, characterized in that: The connecting shaft (204) is fixed by a mounting bracket on the bearing seat (201a), and the connecting shaft (204) passes through the retaining ring (201b).

9. The water pump pre-filter device as described in claim 8, characterized in that: The two first drive racks (202b) of the first drive frame (202) and the two second drive racks (203b) of the second drive frame (203) are staggered. When the two valves (103) connected to the second drive frame (203) are opened, the two valves (103) connected to the first drive frame (202) are closed. When the two valves (103) connected to the second drive frame (203) are closed, the two valves (103) connected to the first drive frame (202) are opened.

10. The water pump pre-filter as described in claim 9, characterized in that: The teeth on the first drive rack (202b) and the second drive rack (203b) mesh with the first gear (104) on the valve (103).

Images