Water delivery pump for central heating

Abstract

The invention relates to the technical field of central heating systems, and discloses a water delivery pump for central heating, which comprises a pump shell assembly, a water pump assembly and a water pump assembly, the impeller is rotatably arranged in the flow channel cavity; the power output end of the rotary driving assembly is connected with the impeller; the base comprises a first base body and a second base body, and a locking groove is formed in the first base body; the second seat body is detachably connected with the first seat body, and an installation cavity is defined by the second seat body and the first seat body; the pump shell assembly is clamped between the second seat body and the first seat body and is accommodated in the mounting cavity; the locking assembly comprises a spring bolt and a driving part, and the spring bolt is arranged on the second seat body in a sliding mode; the driving component is connected with the spring bolt. According to the water delivery pump, the locking assembly and the locking groove are arranged, the driving part is used for driving the spring bolt to stretch into or retreat from the locking groove, the pump shell assembly can be integrally and rapidly locked and unlocked, the cleaning efficiency of incrustation in the pump shell assembly and the impeller replacement efficiency can be improved, and the maintenance difficulty and maintenance time of the water delivery pump are greatly reduced.

Description

Technical Field

[0001] This invention relates to the field of centralized heating system technology, and specifically to a water pump for centralized heating. Background Technology

[0002] In a centralized heating system, the water pump is a key piece of equipment used to transport hot water from heat sources (such as boilers, heat exchange stations, etc.) to various heating terminals (such as residences, office buildings, etc.). Its operating efficiency directly determines the heat transfer efficiency and stability of the entire system, therefore, extremely high requirements are placed on the reliability, efficiency, and durability of the equipment.

[0003] Current water pumps have some inherent shortcomings when dealing with complex operating environments.

[0004] First, during long-term operation, scale will continuously accumulate on the pump body and the inner wall of the flow channel. Existing water pumps have a complex structure, making disassembly difficult and hindering effective cleaning of the accumulated scale. This continuous accumulation of scale not only significantly increases flow channel resistance and pump energy consumption but also leads to a continuous decrease in rated flow rate and head, and in severe cases, can even cause pump overheating or cavitation damage.

[0005] Secondly, due to the fixed impeller design, the performance parameters of the water pump cannot be flexibly adjusted. When the operating conditions of the heating system (such as changes in the heating range or load adjustment) or the requirements for the medium change, a new water pump needs to be replaced, resulting in higher equipment costs. Summary of the Invention

[0006] To address the problem of difficult impeller disassembly in the prior art, the present invention provides a water pump for centralized heating that makes impeller disassembly simpler and more efficient.

[0007] To address the aforementioned problems, this invention provides a water pump for centralized heating, comprising: a pump casing assembly having a flow channel cavity, an inlet, and an outlet, both of which communicate with the flow channel cavity; an impeller rotatably disposed within the flow channel cavity; a rotary drive assembly having its power output end connected to the impeller for driving the impeller to rotate; a base including a first base body and a second base body, the first base body having a locking groove; the second base body and the first base body being arranged sequentially along a first direction, detachably connected, and forming an installation cavity; the pump casing assembly being sandwiched between the second base body and the first base body, and housed within the installation cavity; and a locking assembly including a locking tongue and a driving component, the locking tongue being slidably disposed on the second base body, the sliding direction of the locking tongue being a second direction intersecting the first direction; and the driving component being connected to the locking tongue for driving the locking tongue to slide, causing the locking tongue to extend into or retract from the locking groove.

[0008] It is understandable that the second direction intersects with the first direction, that is, the sliding direction of the latch and the direction of assembly or disassembly of the first and second seats are not parallel.

[0009] The driving component can be an automatic driving component, such as a cylinder, an electric actuator, or a motor lead screw mechanism; or it can be a manual driving component.

[0010] The centralized heating water pump provided by this invention allows for the cleaning of scale in the flow channel cavity or replacement of the impeller by using a drive component to slide the locking tongue out of the locking groove; then the second seat body and the first seat body are separated along the first direction, and the pump casing assembly is removed, so that the flow channel cavity and impeller of the pump casing assembly can be cleaned or the impeller can be replaced.

[0011] Preferably, the driving component includes a screw and a knob, the axis of the screw is in the second direction, and the screw is rotatably mounted on the second base; the knob is located outside the second base and is connected to the screw; the locking tongue is provided with a connecting part, and the connecting part is threadedly connected to the screw.

[0012] To unlock the second and first seats, manually rotate the knob located on the outside of the second seat. The knob drives the connected screw to rotate around its own axis. Because the screw and the latch are connected by a threaded connection, the screw's rotational motion is converted into linear motion of the latch in a second direction, driving the latch to slide until it exits the lock slot. To lock, rotate the knob in the opposite direction, causing the screw to drive the latch to move in the opposite linear direction, allowing it to extend into the lock slot.

[0013] Screw drives have self-locking characteristics. Under vibration and impact conditions, the locking tongue will not retract due to external force, which can ensure the long-term stability of the locking tongue's locked state.

[0014] Preferably, the screw is disposed inside the second housing.

[0015] Central heating systems operate in humid environments and may contain impurities. By fully integrating the screw into the second housing, direct contact between moisture, dust, or system leaks and the screw threads is prevented. This avoids thread corrosion, scaling, or debris embedding, which can lead to thread failure or operational jamming, ensuring the long-term reliability of the locking assembly. Simultaneously, as the core load-bearing component for locking force, the screw is fully enclosed and supported by the second housing, significantly enhancing its structural rigidity. This effectively suppresses the impact of pump vibrations on the locking state, ensuring a stable locking tongue position and further improving the stability of the locking assembly under long-term dynamic loads. Furthermore, integrating the screw into the second housing also improves the compactness of the pump's structure.

[0016] Preferably, the second base is provided with a plurality of anti-rotation ports, which are circumferentially distributed around the axis of the screw; the knob is provided with a plurality of positioning pins, and the plurality of anti-rotation ports are used for the plurality of positioning pins to be inserted one by one; the knob and the screw can slide relative to each other in the second direction and are relatively fixed in the circumferential direction.

[0017] When the screw needs to be rotated to slide the latch, the knob can be pulled outward along the second direction, causing the locating pins on the knob to slide out axially along the anti-rotation socket, thus allowing the knob to rotate freely. After driving the latch into position by rotating the knob, the knob is then pushed in along the second direction, causing the locating pins on the knob to extend into the anti-rotation sockets one by one. The cooperation between the anti-rotation sockets and the locating pins can prevent the knob from being accidentally rotated, thus preventing the latch from sliding and improving the stability of the latch.

[0018] Preferably, the screw has a sliding cavity, and a guide shaft is connected to the side of the knob near the screw. The end of the guide shaft has a first abutting structure, which is located in the sliding cavity and fits against the inner wall of the sliding cavity. The inner wall of the sliding cavity has a second abutting structure, which has a guide cavity. The outer periphery of the guide shaft fits against the inner wall of the guide cavity.

[0019] The cooperation between the sliding cavity and the first abutting structure, as well as the cooperation between the guide cavity and the second abutting structure, makes the axial movement and rotation of the knob smoother. Furthermore, the arrangement of the second abutting structure and the first abutting structure prevents the knob from accidentally detaching from the screw.

[0020] Preferably, it further includes an elastic element, which is sleeved outside the guide shaft, with one end of the elastic element connected to the first abutting structure and the other end abutting against the second abutting structure.

[0021] The elastic element presses against the second abutment structure within the sliding cavity. The second abutment structure generates a reaction force on the elastic element, which is transmitted through the elastic element to the first abutment structure, thereby pulling the knob towards the second seat. Each time the operator rotates and releases the knob, it resets under the elastic force of the elastic element. Therefore, the uncertainty of the latch state due to forgetting to reset it is eliminated, and the possibility of the knob being accidentally bumped, hooked, or mistakenly rotated while not reset is completely eliminated, thus more reliably preventing accidental unlocking or malfunction of the locking assembly.

[0022] Preferably, the first base is provided with a guide post, and the locking groove is provided on the guide post; the second base is provided with a limiting cavity, and the guide post extends into the limiting cavity; the locking tongue is provided inside the second base, and its sliding path passes through the limiting cavity.

[0023] The cooperation between the guide post and the limiting cavity makes the connection between the first and second seats more stable. Furthermore, by completely enclosing the bolt and lock groove within the internal space formed by the guide post, the limiting cavity, and the second seat, the bolt and lock groove are completely isolated from the external environment (humidity, dust, corrosive media) and possible physical collisions and interference, ensuring the long-term reliability and durability of the locking assembly in extreme environments.

[0024] Preferably, the pump housing assembly includes: a first housing, the first housing having a first shoulder on its periphery, and the outlet being disposed on the first housing; a second housing, the second housing having a second shoulder on its periphery, the second shoulder abutting against the first shoulder, and the flow channel cavity and the inlet being formed between the second housing and the first housing; and an annular groove being provided on the inner wall of the mounting cavity, the first shoulder and the second shoulder being both embedded in the annular groove.

[0025] A first shoulder and a second shoulder are respectively provided on the periphery of the first housing and the second housing, and are embedded together in the annular groove of the inner wall of the base. This achieves full-circumferential, clearance-free radial positioning and rigid support for the pump housing assembly, thereby ensuring high stability of the pump housing assembly under operational vibration. Moreover, the first shoulder and the second shoulder fit tightly together under the axial limiting effect of the annular groove, resulting in high airtightness of the flow channel cavity, which can effectively prevent hot water leakage from the flow channel cavity. The connection method between the first housing and the second housing is relatively simple. After separating the second base from the first base, the first housing and the second housing can be quickly removed, allowing for rapid cleaning of the wall surface of the flow channel cavity formed by the first housing and the second housing, and rapid cleaning or replacement of the impeller.

[0026] Preferably, the first shoulder is provided with a plurality of first grooves, and the second shoulder is provided with a plurality of second grooves. The positions of the second grooves correspond one-to-one with the positions of the first grooves, and they form a positioning groove. The inner wall of the annular groove is provided with a plurality of anti-rotation key teeth that correspond one-to-one with the positioning grooves, and each of the anti-rotation key teeth is respectively embedded in the corresponding positioning groove.

[0027] The cooperation between the anti-rotation key and the positioning groove can restrict the circumferential rotation of the first housing and the second housing, ensuring that the first housing and the second housing do not rotate relative to each other, thereby improving the connection sealing between the first housing and the second housing.

[0028] Preferably, at least two locking components are provided, and the two locking components are respectively disposed on opposite sides of the second base; the first base is provided with at least two locking slots, and the two locking slots cooperate with the two locking components respectively.

[0029] Setting at least two locking components ensures that the pump housing assembly is subjected to uniform clamping force within the mounting cavity, preventing local warping of the first and second seats, uneven pressure on the sealing surface, or deformation of the pump housing assembly caused by unilateral locking, and also makes the connection between the second and first seats more secure.

[0030] The beneficial effects of this invention are:

[0031] 1. A locking component and a locking groove are set up. The locking component includes a driving part and a locking tongue. The driving part drives the locking tongue to extend into or retract from the locking groove, which can realize the overall quick locking and unlocking of the pump casing assembly. This can improve the efficiency of cleaning scale inside the pump casing assembly and replacing the impeller, and greatly reduce the maintenance difficulty and maintenance time of the water pump.

[0032] 2. The drive components include a screw, a knob, and an elastic element. The screw's self-locking characteristic effectively prevents the locking tongue from accidentally retracting under long-term vibration and impact. The knob can slide axially and rotate circumferentially, and can automatically reset under the elastic force of the elastic element. It can also be locked to the base by a positioning pin, which can prevent accidental unlocking due to collision, accidental contact, or forgetting to reset, ensuring the stability of the pump housing assembly's locked state. The drive components and the locking tongue are basically built into the second base body, isolated from the external environment, which can ensure the absolute stability of the pump housing assembly's locked state under long-term vibration and humid conditions, and also makes the entire water pump structure more compact and smaller in size.

[0033] 3. The pump housing assembly includes a first housing and a second housing. The mating surfaces of the first housing and the second housing are tightly fitted together. The shoulder structures on the outer periphery of both are tightly embedded in the annular groove of the base. At the same time, the engagement of the groove on the shoulder and the anti-rotation key in the annular groove can prevent relative rotation between the first housing and the second housing. This not only makes the disassembly of the pump housing assembly easier, but also ensures a high degree of sealing between the first housing and the second housing, effectively preventing high-pressure hot water leakage. Attached Figure Description

[0034] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0035] Figure 1 This is a schematic diagram of the external structure of a water pump for centralized heating according to an embodiment of the present invention; Figure 2 This is a partial exploded view of a water pump for centralized heating according to an embodiment of the present invention; Figure 3 Schematic diagram of the locking component and its engagement with the second base; Figure 4 This is a schematic diagram of the base in the disassembled state.

[0036] Explanation of reference numerals in the attached figures: 1. Pump casing assembly; 101. Flow channel cavity; 102. Inlet; 103. First housing; 104. First shoulder; 105. Second housing; 106. Second shoulder; 107. Inlet pipe; 108. Outlet pipe; 109. First groove; 110. Second groove; 2. Impeller; 3. Rotary drive assembly; 4. Base; 401. First base body; 402. Locking groove; 403. Second base body; 404. Mounting cavity; 4 05. Anti-rotation socket; 406. Guide post; 407. Limiting cavity; 408. Annular groove; 409. Anti-rotation key; 5. Locking assembly; 501. Locking tongue; 502. Screw; 503. Sliding cavity; 504. Knob; 505. Connecting part; 506. Positioning pin; 507. Guide shaft; 508. First abutment structure; 509. Second abutment structure; 510. Guide cavity; 511. Elastic element; 512. Anti-disengagement part. Detailed Implementation

[0037] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0038] The following is combined Figures 1 to 4 The following describes embodiments of the present invention.

[0039] An embodiment of the present invention provides a water pump for centralized heating, combined with Figures 1 to 4As shown, it includes: a pump housing assembly 1, which has a flow channel cavity 101, an inlet 102, and an outlet (not shown in the figure), both of which are connected to the flow channel cavity 101; an impeller 2, which is rotatably disposed in the flow channel cavity 101; a rotary drive assembly 3, specifically a motor, whose power output end is connected to the impeller 2 for driving the impeller 2 to rotate; and a base 4, including a first base body 401 and a second base body 403, wherein the first base body 401 is provided with a locking groove 402; the second base body 403 and the first base body 401 are sequentially arranged along a first direction. The two are arranged detachably connected and enclosed to form a mounting cavity 404; the pump housing assembly 1 is sandwiched between the second seat 403 and the first seat 401 and is housed in the mounting cavity 404; the locking assembly 5 includes a locking tongue 501 and a driving component, the locking tongue 501 is slidably disposed on the second seat 403, the sliding direction of the locking tongue 501 is a second direction, the second direction intersects the first direction; the driving component is connected to the locking tongue 501 and is used to drive the locking tongue 501 to slide, so that the locking tongue 501 extends into or retracts from the locking groove 402.

[0040] It is understandable that the second direction intersects the first direction, that is, the sliding direction of the locking tongue 501 and the direction of assembly or disassembly of the first seat 401 and the second seat 403 are not parallel. In this embodiment, the second direction is perpendicular to the first direction, so the locking tongue 501 can resist the separation of the first seat 401 and the second seat 403 with the maximum locking force, thereby achieving the most effective locking.

[0041] The driving component can be an automatic driving component, such as a cylinder, electric actuator, or motor screw mechanism; or it can be a manual driving component.

[0042] When the centralized heating water pump of this embodiment is in use, if it is necessary to clean the scale in the flow channel cavity 101 or replace the impeller 2, the driving component drives the locking tongue 501 to slide, so that the locking tongue 501 exits the locking groove 402; then the second seat 403 is separated from the first seat 401 along the first direction, and the pump housing assembly 1 is removed, so that the flow channel cavity 101 and impeller 2 of the pump housing assembly 1 can be cleaned, or the impeller 2 can be replaced.

[0043] Furthermore, the driving component includes a screw 502 and a knob 504. The axis of the screw 502 is in the second direction, and the screw 502 is rotatably mounted on the second seat 403. The knob 504 is located outside the second seat 403 and is connected to the screw 502. The locking tongue 501 is provided with a connecting part 505, which is slidably connected to the second seat 403 in the second direction. The connecting part 505 is threadedly connected to the screw 502.

[0044] When it is necessary to unlock the second seat 403 and the first seat 401, manually rotate the knob 504 located outside the second seat 403. The knob 504 drives the screw 502 connected to it to rotate around its own axis. Since the screw 502 and the connecting part 505 on the latch 501 are threaded together, the rotational motion of the screw 502 is converted into the linear motion of the latch 501 in the second direction, driving the latch 501 to slide until it exits the lock groove 402. When it is necessary to lock, rotate the knob 504 in the opposite direction, and the screw 502 drives the latch 501 to move in the opposite linear direction, causing it to extend into the lock groove 402.

[0045] The screw 502 drive has a self-locking characteristic. Under vibration and impact conditions, the locking tongue 501 will not retract due to external force, which can ensure the long-term stability of the locking state of the locking tongue 501.

[0046] Furthermore, the end of the screw 502 is provided with an anti-detachment part 512. The anti-detachment part 512 is circular and its diameter is larger than that of the screw 502. The anti-detachment part 512 is rotatably connected to the second seat 403 and is fixed in the axial direction inside the second seat 403.

[0047] Furthermore, the screw 502 is disposed inside the second housing 403.

[0048] Central heating systems operate in humid environments and may contain impurities. By fully integrating the screw 502 into the second housing 403, direct contact between moisture, dust, or system leaks and the screw 502 threads is prevented. This avoids thread corrosion, scaling, or debris embedding, which could lead to thread failure or operational jamming, ensuring the long-term reliability of the locking assembly 5. Simultaneously, as the core load-bearing component for locking force, the screw 502 is fully surrounded and supported by the second housing 403, significantly enhancing its structural rigidity. This effectively suppresses the impact of pump vibrations on the locking state, ensuring the stability of the locking tongue 501 and further improving the operational stability of the locking assembly 5 under long-term dynamic loads. Furthermore, integrating the screw 502 into the second housing 403 also improves the structural compactness of the pump.

[0049] Furthermore, the second base 403 is provided with multiple anti-rotation sockets 405, which are circumferentially distributed around the axis of the screw 502; the knob 504 is provided with multiple positioning pins 506, and the multiple anti-rotation sockets 405 are used for the multiple positioning pins 506 to be inserted one by one; the knob 504 and the screw 502 can slide relative to each other in the second direction and are relatively fixed in the circumferential direction.

[0050] When it is necessary to rotate the screw 502 to slide the latch 501, the knob 504 can be pulled outward along the second direction, causing the positioning pins 506 on the knob 504 to slide out axially along the anti-rotation socket 405, thus allowing the knob 504 to rotate freely. After driving the latch 501 into position by rotating the knob 504, the knob 504 is then pushed in along the second direction, causing the positioning pins 506 on the knob 504 to extend into the anti-rotation socket 405 one by one. The cooperation between the anti-rotation socket 405 and the positioning pins 506 can prevent the knob 504 from being accidentally rotated, thus preventing the latch 501 from sliding and improving the stability of the latch 501.

[0051] Furthermore, the screw 502 is provided with a sliding cavity 503, and the knob 504 is connected to a guide shaft 507 with a square cross-section on the side near the screw 502. The end of the guide shaft 507 is provided with a first abutting structure 508, which is located in the sliding cavity 503 and fits against the inner wall of the sliding cavity 503. The inner wall of the sliding cavity 503 is provided with a second abutting structure 509, and the second abutting structure 509 is provided with a guide cavity 510. The outer periphery of the guide shaft 507 fits against the inner wall of the guide cavity 510.

[0052] The cooperation between the sliding cavity 503 and the first abutting structure 508, and the cooperation between the guide cavity 510 and the second abutting structure 509, makes the axial movement and rotation of the knob 504 smoother. In addition, the arrangement of the second abutting structure 509 and the first abutting structure 508 can prevent the knob 504 from accidentally falling off the screw 502.

[0053] Furthermore, it also includes an elastic element 511, which is sleeved on the outside of the guide shaft 507. One end of the elastic element 511 is connected to the first abutting structure 508, and the other end abuts against the second abutting structure 509. Specifically, the elastic element 511 is a spring. Of course, the elastic element 511 can also be a hollow cylindrical structure made of elastic material, but springs have higher reliability and longer service life.

[0054] The elastic element 511 presses against the second abutment structure 509 within the sliding cavity 503. The second abutment structure 509 generates a reaction force on the elastic element 511, which is transmitted through the elastic element 511 to the first abutment structure 508, thereby pulling the knob 504 towards the second seat 403. Each time the operator rotates and releases the knob 504, the knob 504 will reset under the elastic force of the elastic element 511. Therefore, the uncertainty of the state of the locking tongue 501 due to forgetting to reset it can be eliminated, and the possibility of the knob 504 being accidentally bumped, hooked, or accidentally rotated due to not being reset can be completely eliminated, thus more reliably preventing the locking component 5 from being accidentally unlocked or malfunctioning.

[0055] Furthermore, the first seat 401 is provided with a guide post 406, and the locking groove 402 is provided on the guide post 406; the second seat 403 is provided with a limiting cavity 407, and the guide post 406 extends into the limiting cavity 407; the locking tongue 501 is provided inside the second seat 403, and its sliding path passes through the limiting cavity 407.

[0056] The cooperation between the guide post 406 and the limiting cavity 407 makes the connection between the first seat 401 and the second seat 403 more stable. Furthermore, by completely enclosing the locking tongue 501 and the locking groove 402 within the internal space formed by the guide post 406, the limiting cavity 407, and the second seat 403, the locking tongue 501 and the locking groove 402 are completely isolated from the external environment (humidity, dust, corrosive media) and possible physical collisions and interference, ensuring the long-term reliability and durability of the locking assembly 5 in extreme environments.

[0057] Further, the pump housing assembly 1 includes: a first housing 103, the first housing 103 having a first shoulder 104 on its periphery, and an outlet disposed on the first housing 103; a second housing 105, the second housing 105 having a second shoulder 106 on its periphery, the second shoulder 106 abutting against the first shoulder 104, and a flow channel cavity 101 and an inlet 102 forming between the second housing 105 and the first housing 103; and an annular groove 408 provided on the inner wall of the mounting cavity 404, the first shoulder 104 and the second shoulder 106 being fitted into the annular groove 408.

[0058] Specifically, the inlet 102 is located at the center of the first housing 103, and its central axis coincides with the axis of the impeller 2; the bottom of the first housing 103 and the second housing 105 are each provided with a through groove, and the two through grooves form an outlet. Further, an inlet pipe 107 is connected to the inlet 102, and an outlet pipe 108 is connected to the outlet, with a portion of the outlet pipe 108 embedded inside the first base 401.

[0059] First shoulders 104 and second shoulders 106 are respectively provided on the periphery of the first housing 103 and the second housing 105, and are embedded together in the annular groove of the inner wall of the base 4. This enables the pump housing assembly 1 to achieve full circumferential, clearance-free radial positioning and rigid support, thereby ensuring the high stability of the pump housing assembly 1 under operating vibration. Moreover, the first shoulders 104 and second shoulders 106 are tightly fitted under the axial limiting effect of the annular groove, giving the flow channel cavity 101 a high degree of airtightness, which can effectively prevent hot water from seeping out of the flow channel cavity 101. The connection method between the first housing 103 and the second housing 105 is relatively simple. After separating the second base 403 from the first base 401, the first housing 103 and the second housing 105 can be quickly removed, so that the wall surface of the flow channel cavity 101 formed by the first housing 103 and the second housing 105 can be quickly cleaned, and the impeller 2 can be quickly cleaned or replaced.

[0060] Furthermore, the first shoulder 104 is provided with a plurality of first grooves 109, and the second shoulder 106 is provided with a plurality of second grooves 110. The positions of the second grooves 110 and the first grooves 109 correspond one-to-one and form a positioning groove. The inner wall of the annular groove 408 is provided with a plurality of anti-rotation key teeth 409 corresponding one-to-one with the positioning grooves, and each anti-rotation key tooth 409 is respectively embedded in the corresponding positioning groove.

[0061] The engagement of the anti-rotation key 409 with the positioning groove can restrict the circumferential rotation of the first housing 103 and the second housing 105, ensuring that the first housing 103 and the second housing 105 do not rotate relative to each other, thereby improving the connection sealing performance of the first housing 103 and the second housing 105.

[0062] Furthermore, there are two locking components 5, which are respectively located on opposite sides of the second base 403; the first base 401 is provided with two locking slots 402, which cooperate with the two locking components 5 respectively.

[0063] The two locking components 5 ensure that the pump housing assembly 1 is subjected to uniform clamping force in the mounting cavity 404, avoiding local warping of the first seat 401 and the second seat 403, uneven pressure on the sealing surface, or deformation of the pump housing assembly 1 caused by unilateral locking, and also make the connection between the second seat 403 and the first seat 401 more secure.

[0064] Although embodiments of the invention have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the invention, and such modifications and variations all fall within the scope defined by the appended claims.

Claims

1. A water pump for centralized heating, characterized in that, include: The pump housing assembly (1) is provided with a flow channel cavity (101), an inlet (102) and an outlet, wherein the inlet (102) and the outlet are both connected to the flow channel cavity (101); The impeller (2) is rotatably disposed within the flow channel cavity (101); A rotary drive assembly (3) is provided, wherein the power output end of the rotary drive assembly (3) is detachably connected to the impeller (2) for driving the impeller (2) to rotate; The base (4) includes a first base body (401) and a second base body (403). The first base body (401) is provided with a locking groove (402). The second base body (403) and the first base body (401) are arranged sequentially along a first direction and are detachably connected to each other, forming an installation cavity (404). The pump housing assembly (1) is sandwiched between the second base body (403) and the first base body (401) and is housed in the installation cavity (404). The locking assembly (5) includes a latch (501) and a driving component. The latch (501) is slidably disposed on the second seat (403). The sliding direction of the latch (501) is a second direction, which intersects the first direction. The driving component is connected to the latch (501) and is used to drive the latch (501) to slide, so that the latch (501) extends into or exits the lock groove (402).

2. The water pump for centralized heating according to claim 1, characterized in that, The driving component includes a screw (502) and a knob (504). The axis of the screw (502) is in the second direction, and the screw (502) is rotatably mounted on the second base (403). The knob (504) is located outside the second base (403) and is connected to the screw (502). The latch (501) is provided with a connecting part (505), and the connecting part (505) is threadedly connected to the screw (502).

3. The water pump for centralized heating according to claim 2, characterized in that, The screw (502) is disposed inside the second base (403).

4. The water pump for centralized heating according to claim 3, characterized in that, The second base (403) is provided with a plurality of anti-rotation ports (405), which are circumferentially distributed around the axis of the screw (502); the knob (504) is provided with a plurality of positioning pins (506), which are used for the plurality of positioning pins (506) to be inserted one by one; The knob (504) and the screw (502) can slide relative to each other in the second direction and are relatively fixed relative to each other in the circumferential direction.

5. The water pump for centralized heating according to claim 4, characterized in that, The screw (502) is provided with a sliding cavity (503). The knob (504) is connected to a guide shaft (507) on the side near the screw (502). The end of the guide shaft (507) is provided with a first abutting structure (508). The first abutting structure (508) is located in the sliding cavity (503) and fits against the inner wall of the sliding cavity (503). The inner wall of the sliding cavity (503) is provided with a second abutting structure (509), and the second abutting structure (509) is provided with a guide cavity (510). The outer periphery of the guide shaft (507) is in contact with the inner wall of the guide cavity (510).

6. The water pump for centralized heating according to claim 5, characterized in that, It also includes an elastic element (511), which is sleeved outside the guide shaft (507). One end of the elastic element (511) is connected to the first abutting structure (508), and the other end abuts against the second abutting structure (509).

7. The water pump for centralized heating according to claim 1, characterized in that, The first seat (401) is provided with a guide post (406), and the locking groove (402) is provided on the guide post (406); the second seat (403) is provided with a limiting cavity (407), and the guide post (406) extends into the limiting cavity (407); the locking tongue (501) is provided inside the second seat (403), and its sliding path passes through the limiting cavity (407).

8. The water pump for centralized heating according to claim 1, characterized in that, The pump housing assembly (1) includes: A first housing (103) is provided with a first shoulder (104) on its periphery, and the water outlet is provided on the first housing (103); The second housing (105) has a second shoulder (106) on its periphery, the second shoulder (106) abuts against the first shoulder (104), and the flow channel cavity (101) and the water inlet (102) are formed between the second housing (105) and the first housing (103); The inner wall of the mounting cavity (404) is provided with an annular groove (408), and the first shoulder (104) and the second shoulder (106) are both embedded in the annular groove (408).

9. The water pump for centralized heating according to claim 8, characterized in that, The first shoulder (104) is provided with a plurality of first grooves (109), and the second shoulder (106) is provided with a plurality of second grooves (110). The positions of the second grooves (110) and the first grooves (109) correspond one-to-one and form a positioning groove. The inner wall of the annular groove (408) is provided with a plurality of anti-rotation key teeth (409) that correspond one-to-one with the positioning grooves. Each anti-rotation key tooth (409) is respectively embedded in the corresponding positioning groove.

10. The water pump for centralized heating according to any one of claims 1 to 9, characterized in that, The locking component (5) is provided in at least two, and the two locking components (5) are respectively disposed on opposite sides of the second seat (403); the first seat (401) is provided with at least two locking grooves (402), and the two locking grooves (402) cooperate with the two locking components (5) respectively.

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