Heater oil pump

Abstract

The utility model discloses a kind of heater oil pumps, including pump body, the oil inlet pipe is coaxially connected with the beginning end of pump body, the oil outlet pipe is coaxially connected with the end of pump body, the oil inlet pipe beginning end is provided with connecting disc, connecting assembly for connecting the connecting disc with the oil outlet end connection of outside fuel tank is provided on the connecting disc, limiting structure for being cooperated with connecting assembly to limit connecting assembly swing or displacement or disengaging connecting disc is provided on the oil inlet pipe.The utility model solves the problem that the connection strength between the oil inlet pipe of traditional heater oil pump and the oil outlet end of outside fuel tank is too low, and the connecting bolt between the two is easy to fall off.

Description

Technical Field

[0001] This utility model relates to the field of heater oil pump technology, specifically a heater oil pump. Background Technology

[0002] Fuel-fired heating systems are widely used in industrial production, machinery and equipment, and residential heating. The heater oil pump, a key component of these systems, primarily delivers fuel from the fuel tank to the heater for heating, meeting the system's heating requirements. Currently, traditional heater oil pumps connect to external fuel tanks by a connecting plate at the beginning of the pump's inlet pipe. This connecting plate is then connected to the fuel tank's outlet using components such as bolts and flanges. However, this traditional connection method has significant drawbacks. In actual use, due to fuel flow, equipment vibration, and external environmental factors, the connecting components are prone to shaking, displacement, or even detachment from the connecting plate. This reduces the connection strength between the connecting plate and the fuel tank's outlet, causing uneven stress on the connecting bolts. Over time, the connecting bolts are prone to falling off. This loss of bolts leads to connection failure between the inlet pipe and the fuel tank's outlet, affecting the heater oil pump's normal operation, interrupting fuel delivery, and preventing the heating system from functioning properly. In severe cases, it can even cause fuel leaks and other safety issues, causing significant inconvenience and safety hazards to production and daily life. Utility Model Content

[0003] To address the shortcomings of existing technologies, this utility model provides a heater oil pump that solves the problem of low connection strength between the oil inlet pipe and the oil outlet of the external fuel tank in traditional heater oil pumps, and the easy detachment of the connecting bolts between the two.

[0004] To achieve the above objectives, this utility model provides a heater oil pump, including a pump body, an oil inlet pipe coaxially connected to the beginning of the pump body, an oil outlet pipe coaxially connected to the end of the pump body, a connecting plate provided at the beginning of the oil inlet pipe, a connecting component provided on the connecting plate for connecting the connecting plate to the oil outlet of an external fuel tank, and a limiting structure provided on the oil inlet pipe for cooperating with the connecting component to limit the shaking, displacement or detachment of the connecting component from the connecting plate.

[0005] The advantages of adopting the above technical solution are: by setting a limiting structure on the oil inlet pipe that cooperates with the connecting component, the shaking, displacement or detachment of the connecting component can be effectively limited. Compared with the traditional method that only relies on bolt connection, the limiting structure and the connecting component form a double limit, which significantly improves the connection strength between the connecting plate and the oil outlet of the fuel tank, avoids the connecting bolts from falling off due to vibration and other factors, ensures the stability of the heater oil pump during operation, reduces the risk of fuel leakage, and extends the service life of the equipment.

[0006] The present invention further comprises: the connecting disc having a plurality of connecting holes evenly distributed around its circumference; the connecting assembly including a plurality of connecting bolts and a plurality of connecting pins; the plurality of connecting bolts and the plurality of connecting pins being arranged one-to-one with the plurality of connecting holes, and the plurality of connecting bolts and the plurality of connecting pins being arranged in staggered positions; the screw end of the connecting bolt being a connecting end for threaded connection with a pre-embedded hole on an external fuel tank; and the end of the connecting pin being a limiting end for fitting and tightening into a preset hole on an external fuel tank.

[0007] The advantages of adopting the above technical solution are: the connecting bolts and connecting pins are staggered in the above technology, the bolts provide basic tensile force through threaded connection, and the expansion limiting end of the connecting pin cooperates with the preset hole to form shear resistance. The two work together to disperse the stress at the connection point. The staggered distribution structure design enhances the vibration resistance of the connecting component, avoids overload of a single bolt, effectively solves the problem of easy loosening of traditional single bolt connection, and enables the connecting component to maintain reliable connection under complex working conditions.

[0008] This utility model further includes: a compression groove circumferentially formed on the inner wall of the connecting plate; a sliding groove formed on the connecting plate corresponding to each connecting hole; the beginning ends of several sliding grooves communicating with the openings of their respective connecting holes; the ends of several sliding grooves communicating with the compression groove; a limiting plate slidingly disposed in each sliding groove; the limiting structure including a compression sleeve sleeved on the pump body; the beginning end of the compression sleeve being a compression end for inserting into the compression groove and compressing the ends of several limiting plates so that the limiting plates slide synchronously in their respective corresponding sliding grooves; the compression end compressing the ends of the limiting plates so that the limiting plate near the connecting pin covers the beginning end of the connecting pin; the compression end compressing the ends of the limiting plates so that the limiting plate near the connecting bolt abuts against the outer peripheral wall of the nut end of the connecting bolt.

[0009] The advantages of adopting the above technical solution are: after the extrusion end of the extrusion sleeve is placed into the extrusion groove, it pushes the limiting plate to slide, so that the limiting plate near the connecting pin covers the beginning of the pin body, preventing the pin from axially coming out; the limiting plate near the bolt abuts against the outer periphery of the nut, restricting the bolt from rotating and loosening. This structure forms a double lock on the circumferential and axial direction of the connecting component through mechanical limiting, which can achieve fast fastening without additional tools. Moreover, the fit structure between the limiting plate and the extrusion sleeve is compact, which is suitable for space-constrained scenarios and significantly improves the reliability of the connection.

[0010] The present invention further comprises: the end face of the limiting plate and the top wall of the limiting plate are connected by a smooth curved surface and form a first inclined surface; the end face of the extrusion end and the outer peripheral wall of the extrusion sleeve are connected by a smooth curved surface and form a second inclined surface for abutting against several first inclined surfaces when the extrusion end is placed into the extrusion groove; and a wear-resistant rubber ring is circumferentially embedded on the second inclined surface.

[0011] The advantages of adopting the above technical solution are: the curved surface design of the first inclined surface and the second inclined surface in the above technology allows all the limiting plates to slide synchronously and evenly when the extrusion sleeve is inserted, avoiding jamming caused by uneven force. The wear-resistant rubber ring reduces friction loss during the extrusion process, reduces component wear, and extends the service life of the limiting structure. At the same time, the elastic deformation of the rubber ring can compensate for a certain degree of installation error, improve structural adaptability, and ensure the limiting stability during long-term use.

[0012] The present invention further comprises: limiting grooves are provided on both sides of the sliding groove; limiting blocks extend from both sides of the limiting plate toward the adjacent limiting grooves; the limiting blocks are slidably disposed in the limiting grooves; the radial cross section of the limiting blocks is trapezoidal and is adapted to the radial cross section of the limiting grooves.

[0013] The advantages of adopting the above technical solution are: the trapezoidal fitting structure of the limiting block and the limiting groove in the above technology not only ensures the smooth sliding of the limiting plate in the sliding groove, but also effectively prevents the limiting plate from radially dislodging or tilting. This design enhances the guidance and stability of the limiting plate during movement, avoids the failure of the limiting structure due to the limiting plate jamming, and ensures that the limiting plate can still reliably limit the connecting components under dynamic loads such as vibration, thus ensuring the long-term reliable operation of the entire connecting structure.

[0014] The present invention is further provided that the inner peripheral wall of the shaft hole of the extrusion sleeve is threadedly connected to the outer peripheral wall of the oil inlet pipe.

[0015] The advantages of adopting the above technical solution are: the threaded connection between the extrusion sleeve and the oil inlet pipe in the above technology makes it easy to adjust the screwing depth of the extrusion sleeve according to the actual working conditions, thereby controlling the limiting force of the limiting plate on the connecting components, adapting to the connection requirements of fuel tanks of different specifications, and the threaded connection structure has both convenient disassembly and assembly and flexible adjustment, and can be installed and maintained without special tools, improving the applicability of the heater oil pump and reducing the difficulty of on-site installation and commissioning. Attached Figure Description

[0016] Figure 1 This is a three-dimensional view of the present invention;

[0017] Figure 2 This is a partially exploded three-dimensional view of the connecting disk and its components in this utility model;

[0018] Figure 3 This is a simplified schematic view of the engagement state of the limiting block and the limiting groove in this utility model. Detailed Implementation

[0019] This utility model provides a heater oil pump, including a pump body 1. An oil inlet pipe 11 is coaxially connected to the beginning of the pump body 1, and an oil outlet pipe 12 is coaxially connected to the end of the pump body 1. A connecting plate 2 is provided at the beginning of the oil inlet pipe 11. The connecting plate 2 is provided with a connecting assembly for connecting the connecting plate 2 to the oil outlet of an external fuel tank. The oil inlet pipe 11 is provided with a limiting structure for cooperating with the connecting assembly to restrict the connecting assembly from shaking, shifting, or detaching from the connecting plate 2. The connecting plate 2 has a plurality of connecting holes 21 evenly distributed around its circumference. The connecting assembly includes a plurality of connecting bolts 22 and a plurality of connecting pins 23. The plurality of connecting bolts 22 and the plurality of connecting pins 23 are connected to the plurality of connecting holes 21. The connecting holes 21 are arranged one-to-one, and the positions of several connecting bolts 22 and several connecting pins 23 are staggered. The screw end of the connecting bolt 22 is a connecting end for threaded connection with the pre-embedded hole on the external fuel tank. The end of the connecting pin 23 is a limiting end for insertion and tightening fit with the preset hole on the external fuel tank. The inner wall of the connecting plate 2 is provided with a compression groove 24 circumferentially. The connecting plate 2 is provided with a sliding groove 25 corresponding to each connecting hole 21. The beginning of several sliding grooves 25 is connected to the opening of their respective connecting holes 21, and the end of several sliding grooves 25 is connected to the compression groove 24. Each sliding groove 25 has a limited sliding space. Position plate 3, the limiting structure includes a compression sleeve 4 sleeved on pump body 1, the starting end of the compression sleeve 4 is a compression end 41 for inserting into the compression groove 24 and compressing the ends of several limiting plates 3 so that the several limiting plates 3 slide synchronously in their respective corresponding sliding grooves 25, the compression end 41 compresses the ends of the limiting plates 3 so that the limiting plate 3 near the connecting pin 23 covers the starting end of the connecting pin 23, the compression end 41 compresses the ends of the limiting plates 3 so that the limiting plate 3 near the connecting bolt 22 abuts against the outer peripheral wall of the nut end of the connecting bolt 22, the end face of the limiting plate 3 and the top wall of the limiting plate 3 are connected by a smooth curved surface and form a first inclined surface 31, the end face of the compression end 41 and the compression end 24 are connected by a compression end 41. The outer peripheral walls of the compression sleeve 4 are connected by a smooth curved surface and form a second inclined surface 42 for abutting against several first inclined surfaces 31 when the extrusion end 41 is placed into the extrusion groove 24. A wear-resistant rubber ring is circumferentially embedded on the second inclined surface 42. Limiting grooves 251 are opened on both sides of the slide groove 25. Limiting blocks 32 extend from both sides of the limiting plate 3 toward the adjacent limiting grooves 251. The limiting blocks 32 are slidably disposed in the limiting grooves 251. The radial cross section of the limiting blocks 32 is trapezoidal and is adapted to the radial cross section of the limiting grooves 251. The inner peripheral wall of the shaft hole of the extrusion sleeve 4 is threadedly connected to the outer peripheral wall of the oil inlet pipe 11.

[0020] The accompanying drawings in the above instruction manual are for illustrative purposes only and do not limit the size or shape. They can be adjusted according to actual production or assembly requirements.

[0021] The foregoing has shown and described the basic principles and main features of this utility model, as well as its advantages. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications may be made to this utility model without departing from its spirit and scope. All such changes and modifications fall within the scope of protection of this utility model as defined by the appended claims and their equivalents.

Claims

1. A heater oil pump, comprising a pump body, wherein an oil inlet pipe is coaxially connected to the beginning of the pump body, and an oil outlet pipe is coaxially connected to the end of the pump body, characterized in that: The inlet pipe is provided with a connecting plate at its starting end. The connecting plate is provided with a connecting assembly for connecting the connecting plate to the oil outlet of an external fuel tank. The inlet pipe is provided with a limiting structure for cooperating with the connecting assembly to limit the shaking, displacement, or detachment of the connecting assembly from the connecting plate. The connecting plate is provided with a number of connecting holes evenly distributed around its circumference. The connecting assembly includes a number of connecting bolts and a number of connecting pins. The number of connecting bolts and connecting pins are arranged one-to-one with the number of connecting holes, and the positions of the number of connecting bolts and connecting pins are staggered. The screw end of the connecting bolt is a connecting end for threaded connection with a pre-embedded hole on the external fuel tank. The end of the connecting pin is a limiting end for insertion and tightening fit with a preset hole on the external fuel tank.

2. The heater oil pump according to claim 1, characterized in that: The inner wall of the connecting plate is provided with a circumferential extrusion groove, and a sliding groove is provided on the connecting plate corresponding to each connecting hole. The beginning ends of the sliding grooves are connected to the openings of their respective connecting holes, and the ends of the sliding grooves are connected to the extrusion grooves. A limiting plate is slidably installed in each sliding groove. The limiting structure includes an extrusion sleeve fitted on the pump body. The beginning end of the extrusion sleeve is an extrusion end used to insert into the extrusion groove and extrude the ends of the limiting plates so that the limiting plates slide synchronously in their respective sliding grooves. The extrusion end extrudes the ends of the limiting plates so that the limiting plate near the connecting pin covers the beginning end of the connecting pin. The extrusion end extrudes the ends of the limiting plates so that the limiting plate near the connecting bolt abuts against the outer peripheral wall of the nut end of the connecting bolt.

3. A heater oil pump according to claim 2, characterized in that: The end face of the limiting plate is connected to the top wall of the limiting plate with a smooth curved surface and forms a first inclined surface. The end face of the extrusion end is connected to the outer peripheral wall of the extrusion sleeve with a smooth curved surface and forms a second inclined surface for abutting against several first inclined surfaces when the extrusion end is placed into the extrusion groove. A wear-resistant rubber ring is circumferentially embedded on the second inclined surface.

4. A heater oil pump according to claim 2, characterized in that: Limiting grooves are formed on both sides of the slide. Limiting blocks extend from both sides of the limiting plate into the adjacent limiting grooves. The limiting blocks are slidably disposed in the limiting grooves. The radial cross-section of the limiting blocks is trapezoidal and is adapted to the radial cross-section of the limiting grooves.

5. A heater oil pump according to claim 2, characterized in that: The inner circumferential wall of the shaft hole of the extrusion sleeve is threadedly connected to the outer circumferential wall of the oil inlet pipe.

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