A self-priming gear pump with anti-blocking function for liquid inlet

Abstract

The present invention relates to the field of fluid transportation, specifically a self-priming gear pump with anti-blocking function for liquid inlet, comprising a base, a pump housing, a driving gear shaft, a driven gear shaft, two driving gears and a pumping gear, wherein the pump housing is fixedly connected to the left end of the upper surface of the base, the driving gear shaft and the driven gear shaft are respectively mounted on the upper and lower ends of the inner cavity of the pump housing through bearings, the two driving gears are respectively mounted on the outer walls of the driving gear shaft and the driven gear shaft, and the two driving gears are meshed with each other, the pumping gear is mounted on the right end of the driving gear shaft, and further comprises a temperature sensing probe, a filtering mechanism and a power supply mechanism, wherein the temperature sensing probe is mounted on the side wall of the water inlet of the pump housing; the filtering mechanism is mounted on the water inlet of the pump housing to filter the fluid entering the pump housing. Regular cleaning of the filter screen can not only prevent blockage of liquid inlet, but also ensure the delivery flow, and can automatically adjust the delivery pressure according to the viscosity of the fluid, so as to protect the delivery components and achieve high delivery efficiency.

Description

Technical Field

[0001] The invention relates to the technical field of fluid transportation, in particular to a self-priming gear pump with liquid inlet anti-blocking function. Background Art

[0002] The gear pump is a rotary pump that relies on the change and movement of the working volume formed between the pump cylinder and the meshing gears to transport liquid or increase its pressure. It consists of two closed spaces, two gears, a pump body, and front and rear covers. When the gears rotate, the volume of the space on the side where the gears are disengaged changes from small to large, forming a vacuum to suck the liquid in, and the volume of the space on the side where the gears are meshed changes from large to small, squeezing the liquid into the pipeline. The gear pump has a large flow rate for transporting oil substances, which can meet the needs of the hydraulic system. In order to prevent the gear pump from being blocked, a filter is usually installed at the liquid inlet. However, during long-term filtration, the mesh of the filter will be blocked by impurities, and the machine can only be stopped for cleaning, otherwise the efficiency of oil substance transportation will be reduced. In addition, the viscosity of oil substances gradually decreases with the increase of temperature. At present, the gear pump cannot adjust the delivery flow rate according to the viscosity of the oil substance. High viscosity will damage the parts related to transportation, and low viscosity cannot increase the gear speed in the gear pump, which will reduce the delivery flow rate. Summary of the invention

[0003] The purpose of the embodiments of the present invention is to provide a self-priming gear pump with anti-blocking function for liquid inlet, so as to solve the problems in the above-mentioned background technology that the filter cannot be cleaned regularly, the oil material conveying efficiency is reduced, and the conveying flow rate cannot be automatically adjusted according to the viscosity of the oil material.

[0004] To achieve the above-mentioned purpose, an embodiment of the present invention provides the following technical solutions: a self-priming gear pump with anti-blocking function for liquid inlet, comprising a base, a pump casing, a driving gear shaft, a driven gear shaft, two driving gears and a pumping gear, wherein the pump casing is fixedly connected to the left end of the upper surface of the base, the driving gear shaft and the driven gear shaft are respectively installed at the upper and lower ends of the inner cavity of the pump casing through bearings, the two driving gears are respectively installed on the outer walls of the driving gear shaft and the driven gear shaft, and the two driving gears are meshed with each other, the pumping gear is installed on the right end of the driving gear shaft, and further comprises a temperature sensing probe, a filtering mechanism and a power supply mechanism, the temperature sensing probe is installed on the side wall of the water inlet of the pump casing; the filtering mechanism is installed on the water inlet of the pump casing to filter the fluid entering the pump casing; the power supply mechanism is fixedly connected to the right end of the upper surface of the base, and the driving gear shaft is rotated through the meshing transmission of the power supply mechanism and the pumping gear.

[0005] As a further solution of the present invention: the purpose is to brush the filter screen and remove impurities on the surface of the filter screen. The filtering mechanism includes a filter box, a filter screen, a sleeve, a limit groove, a multi-stage electric telescopic rod, a telescopic rod, a limit block, a brush, an ejector pin and a storage assembly. The filter box is installed at the water inlet of the pump housing; the filter screen is installed at the top of the inner cavity of the filter box, and the fluid is filtered through the filter screen; the sleeve is horizontally installed in the middle of the left side wall of the filter box, and the inner wall of the sleeve is provided with a limit groove from left to right; the multi-stage electric telescopic rod is horizontally installed at the left end of the sleeve, and the multi-stage electric telescopic rod is externally connected to a timer to control the timing start of the multi-stage electric telescopic rod; the telescopic rod is rotatably installed at the output end of the multi-stage electric telescopic rod through a bearing, and the telescopic rod is plugged into the inner cavity of the sleeve; the limit block is installed at the left end of the outer wall of the telescopic rod, and the limit block is plugged into the inner cavity of the limit groove; the brush is installed at the right end of the telescopic rod, and the brush is circular; the ejector pin is installed at the center of the right side wall of the brush; and the storage assembly is fixedly connected to the right side wall of the filter box.

[0006] As a further solution of the present invention: the limiting grooves are distributed on the inner wall of the sleeve in a spiral shape.

[0007] As a further solution of the present invention: the purpose is to collect impurities cleaned out of the filter net, the storage assembly includes a storage box, a limit rod, a sliding sleeve, a spring and a baffle, the storage box is fixedly connected to the right side wall of the filter box; the limit rod is horizontally installed at the center position of the right inner wall of the storage box; the sliding sleeve and the spring are respectively sleeved on the left and right ends of the outer wall of the limit rod, and the sliding sleeve is pushed to the left under the action of the spring elastic force; the baffle is installed at the left end of the sliding sleeve.

[0008] As a further scheme of the present invention: the purpose is to adjust the delivery flow rate according to the temperature of the oil substance, the power supply mechanism includes a drive box, a hydraulic cylinder, a guide plate, a guide groove, a slide bar, a lifting plate, a roller, a rotating assembly and a controller, the drive box is fixedly connected to the right end of the upper surface of the base; the hydraulic cylinder is installed at the front end of the inner cavity of the drive box along the front and rear direction; the guide plate is installed at the output end of the hydraulic cylinder, and the guide plate is pushed forward and backward by the hydraulic cylinder, and a guide groove is provided on the outer wall of the guide plate; there are two slide bars, which are vertically fixedly connected to the front and rear ends of the left side of the bottom of the inner cavity of the drive box respectively; the lifting plate is slidably connected to the outer wall of the slide bar; the roller is installed at the bottom end of the right side wall of the lifting plate, and the roller is inserted into the inner cavity of the guide groove; the rotating assembly is fixedly connected to the top of the lifting plate; the controller is installed on the front of the rotating assembly, and the controller is electrically connected to the temperature sensor.

[0009] As a further solution of the present invention: the guide grooves are distributed on the outer wall of the guide plate from top to bottom and tilted toward the rear side.

[0010] As a further solution of the present invention: the rotating assembly includes a casing, a support shaft, a first speed gear, a second speed gear, a motor and a motor gear. The casing is fixedly connected to the top of the lifting plate, and the front of the casing is connected to the rear side of the controller; there are two support shafts, which are respectively installed at the upper and lower ends of the inner cavity of the casing through bearings; the first speed gear and the second speed gear are respectively installed on the outer walls of the two support shafts, and the first speed gear and the second speed gear can be meshed and connected with the pumping gear; the motor is installed on the right side wall of the casing, and the motor is electrically connected to the controller; the motor gear is installed at the output end of the motor, and the motor gear is meshed and connected with the first speed gear and the second speed gear.

[0011] As a further solution of the present invention: the transmission ratio of the first speed change gear to the water pumping gear is greater than 1, and the transmission ratio of the second speed change gear to the water pumping gear is less than 1.

[0012] Compared with the prior art, the embodiments of the present invention have the following beneficial effects:

[0013] 1. The present invention drives the telescopic rod to move right through the multi-stage electric telescopic rod, and the limit block slides along the limit groove, prompting the telescopic rod to drive the brush to move right and rotate at the same time. The brush brushes the mesh of the filter screen, and the ejector pin preferentially touches the baffle plate. The baffle plate moves right to open the right side opening of the filter box, and the brush pushes the impurities into the storage box. When the brush moves left under the drive of the multi-stage electric telescopic rod, the ejector pin moves away from the baffle plate. Under the action of the spring force, the baffle plate moves left to close the right side opening of the filter box, thereby realizing regular cleaning of the filter screen, which can not only prevent the liquid inlet from being blocked, but also ensure the delivery flow rate.

[0014] 2. The present invention monitors the fluid temperature through a temperature sensor. When the fluid temperature is low and the viscosity is high, the controller controls the hydraulic cylinder to drive the guide plate to move forward, and the roller descends along the inclined surface of the guide groove, causing the lifting plate to descend, and the first speed gear contacts the pumping gear, reducing the rotation speed of the pumping gear, increasing the torque, and reducing the fluid delivery pressure. When the fluid temperature is high and the viscosity is low, the controller controls the hydraulic cylinder to drive the guide plate to move backward, and the lifting plate rises in cooperation with the roller and the guide groove, causing the second speed gear to contact the pumping gear, the rotation speed of the pumping gear increases, the torque decreases, and the fluid delivery flow rate increases. Therefore, the delivery pressure can be automatically adjusted according to the fluid viscosity, so as to protect the delivery components and have high delivery efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the structure of the present invention.

[0016] Figure 2 It is a front cross-sectional view of the present invention.

[0017] Figure 3 It is a schematic diagram of the structure of the filtering mechanism of the present invention.

[0018] Figure 4 It is a top cross-sectional view of the filter mechanism of the present invention.

[0019] Figure 5 It is a right side cross-sectional view of the filtering mechanism of the present invention.

[0020] Figure 6 It is a schematic diagram of the sleeve structure of the present invention.

[0021] Figure 7 It is a right side cross-sectional view of the power supply mechanism of the present invention.

[0022] Figure 8 It is a front cross-sectional view of the rotating assembly of the present invention.

[0023] In the figure: 1. base; 2. pump housing; 3. driving gear shaft; 4. driven gear shaft; 5. driving gear; 6. pumping gear; 7. temperature sensor; 8. filtering mechanism; 9. power supply mechanism; 81. filter box; 82. filter screen; 83. sleeve; 84. limit groove; 85. multi-stage electric telescopic rod; 86. telescopic rod; 87. limit block; 88. brush; 89. ejector pin; 810. storage assembly; 8101. storage box ;8102, limit rod;8103, sleeve;8104, spring;8105, baffle;91, drive box;92, hydraulic cylinder;93, guide plate;94, guide groove;95, slide rod;96, lifting plate;97, roller;98, rotating assembly;99, controller;981, housing;982, support shaft;983, first speed gear;984, second speed gear;985, motor;986, motor gear. DETAILED DESCRIPTION

[0024] The technical solution of the present invention is further described in detail below in conjunction with specific implementation methods.

[0025] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0026] See also Figure 1-8In an embodiment of the present invention, a self-priming gear pump with anti-blocking function for liquid inlet includes a base 1, a pump housing 2, a driving gear shaft 3, a driven gear shaft 4, two driving gears 5 and a pumping gear 6. The pump housing 2 is fixedly connected to the left end of the upper surface of the base 1, and the driving gear shaft 3 and the driven gear shaft 4 are respectively installed at the upper and lower ends of the inner cavity of the pump housing 2 through bearings. The driving gear 5 is installed at the right end of the driving gear shaft 3. The outer walls of the driving gear shaft 3 and the driven gear shaft 4 are both installed with mutually meshing pumping gears 6, and suction is generated by the relative rotation of the two pumping gears 6. A temperature sensing probe 7 is installed on the outer wall of the water inlet of the pump housing 2, and the temperature sensing probe 7 is used to detect the temperature of the fluid. A filtering mechanism 8 is fixedly connected to the water inlet of the pump housing 2 to filter the fluid entering the pump housing 2. A power supply mechanism 9 is fixedly connected to the right end of the upper surface of the base 1, and the driving gear shaft 3 is driven to rotate by the power supply mechanism 9 in cooperation with the driving gear 5.

[0027] Furthermore, the filtering mechanism 8 includes a filter box 81 fixedly connected to the water inlet of the pump housing 2, a filter screen 82 is installed on the top of the inner cavity of the filter box 81, and impurities in the fluid are filtered through the filter screen 82. A sleeve 83 is installed horizontally on the left side wall of the filter box 81, and a limit groove 84 is provided on the inner wall of the sleeve 83 from left to right. A multi-stage electric telescopic rod 85 is installed horizontally on the left side wall of the sleeve 83. The multi-stage electric telescopic rod 85 is externally connected to a timer so that the multi-stage electric telescopic rod 85 can be started at a fixed time. A telescopic rod 86 is installed at the output end of the multi-stage electric telescopic rod 85 for driving the telescopic rod 86 to move left and right. The telescopic rod 86 and the inner wall of the sleeve 83 are connected to each other. The limit block 87 is installed at the left end of the outer wall of the telescopic rod 86 and is plugged into the inner cavity of the limit groove 84. The limit groove 84 is spirally distributed on the inner wall of the sleeve 83. When the telescopic rod 86 moves to the right, the limit block 87 slides in the limit groove 84, thereby causing the telescopic rod 86 to rotate. A brush 88 is installed at the right end of the telescopic rod 86. The brush 88 is circular in shape, and the filter screen 82 is arc-shaped, so that the brush 88 can fully contact the filter screen 82. A thimble 89 is installed at the center of the right side wall of the brush 88, and a storage component 810 is fixedly connected to the right side wall of the filter box 81.

[0028] Furthermore, the storage assembly 810 includes a storage box 8101 fixedly connected to the right side wall of the filter box 81, and a nut is screwed on the bottom of the storage box 8101. By removing the nut, the debris in the storage box 8101 can be cleaned out, and a limit rod 8102 is horizontally installed in the middle of the right inner wall of the storage box 8101, and the left and right sides of the outer wall of the limit rod 8102 are respectively sleeved with a sliding sleeve 8103 and a spring 8104, and the sliding sleeve 8103 is pushed to the left by the elastic force of the spring 8104. A baffle 8105 is installed on the left end of the sliding sleeve 8103, and the right side opening of the filter box 81 is closed by the baffle 8105.

[0029] Furthermore, the power supply mechanism 9 includes a driving box 91 fixedly connected to the right end of the upper surface of the base 1, a hydraulic cylinder 92 is installed on the front side of the inner cavity of the driving box 91 along the front-to-back direction, a guide plate 93 connected to the inner cavity of the driving box 91 is installed at the output end of the hydraulic cylinder 92, and a guide groove 94 inclined from top to bottom to the rear side is provided on the outer wall of the guide plate 93, and sliding rods 95 are fixedly connected to the front and rear ends of the left side of the bottom of the inner cavity of the driving box 91, and a lifting plate 96 that can slide up and down is sleeved on the outer wall of the sliding rod 95, and a roller 97 connected to the inner cavity of the guide groove 94 is installed at the bottom end of the right side wall of the lifting plate 96. When the guide plate 93 moves forward and backward, the roller 97 rolls downward or upward along the inclined surface of the guide groove 94, thereby realizing the descent or ascent of the lifting plate 96, and a rotating component 98 is fixedly connected to the top of the lifting plate 96, and a controller 99 electrically connected to the temperature sensing probe 7 is installed on the front of the rotating component 98.

[0030] Furthermore, the rotating assembly 98 includes a casing 981 fixedly connected to the top of the lifting plate 96, the front of the casing 981 is connected to the rear side of the controller 99, support shafts 982 are installed at the upper and lower ends of the inner cavity of the casing 981 through bearings, and the outer walls of the upper and lower support shafts 982 are respectively installed with a first speed gear 983 and a second speed gear 984, and the first speed gear 983 and the second speed gear 984 can both be meshed and connected with the pumping gear 6, and the transmission ratio of the first speed gear 983 to the pumping gear 6 is greater than 1, which reduces the speed of the pumping gear 6 and increases the torque. The transmission ratio of the second speed gear 984 to the pumping gear 6 is less than 1, which increases the speed of the pumping gear 6 and reduces the torque. A motor 985 electrically connected to the controller 99 is installed on the right side wall of the casing 981, and a motor gear 986 is installed at the output end of the motor 985, and the motor gear 986 is meshed and connected with the first speed gear 983 and the second speed gear 984.

[0031] Working principle:

[0032] Step 1: The two driving gears 5 rotate relative to each other to generate suction in the pump housing 2, and the fluid enters the filter box 81. The filter screen 82 filters impurities in the fluid, passes through the temperature probe 7, enters the pump housing 2, and is discharged from the water outlet of the pump housing 2 to achieve fluid transportation. The temperature probe 7 monitors the temperature change of the fluid and gives feedback to the controller 99.

[0033] Step 2: The telescopic rod 86 is driven to move rightward by the multi-stage electric telescopic rod 85, so that the limit block 87 slides in the limit groove 84. The telescopic rod 86 drives the brush 88 to rotate due to the shape of the limit groove 84. The brush 88 moves from left to right to clean the mesh on the surface of the filter screen 82. The ejector pin 89 squeezes the baffle plate 8105 to move rightward, and the sliding sleeve 8103 squeezes the spring 8104. The right opening of the filter box 81 is opened, and the brush 88 pushes the impurities into the storage box 8101. When the brush 88 moves to the left, the ejector pin 89 moves away from the baffle plate 8105. The elastic force of the spring 8104 makes the baffle plate 8105 move to the left to close the right opening of the filter box 81, thereby completing the regular cleaning of the filter screen 82 without affecting the fluid delivery flow rate.

[0034] Step three, when the fluid temperature is low and the viscosity is high, the controller 99 drives the hydraulic cylinder 92 to drive the guide plate 93 to move forward, and the roller 97 descends along the inclined surface of the guide groove 94, causing the lifting plate 96 to descend along the outer wall of the slide bar 95, and the first speed gear 983 contacts the pumping gear 6. Under the transmission of the motor gear 986, the first speed gear 983 and the pumping gear 6, the speed of the pumping gear 6 decreases, the torque increases, and the fluid delivery flow rate is reduced to protect the delivery components. When the fluid temperature is high and the viscosity is low, the controller 99 drives the hydraulic cylinder 92 to drive the guide plate 93 to move backward, and the lifting plate 96 rises under the cooperation of the roller 97 and the guide groove 94, and the second speed gear 984 contacts the pumping gear 6. The speed of the pumping gear 6 increases, the fluid flow rate is increased, and the fluid delivery efficiency is increased.

[0035] The above are only preferred embodiments of the present invention. It should be pointed out that, for those skilled in the art, several modifications and improvements can be made without departing from the concept of the present invention. These should also be regarded as the protection scope of the present invention. These will not affect the effect of the implementation of the present invention and the practicality of the patent.

Claims

1. A self-priming gear pump with anti-blocking function for liquid inlet, characterized in that: The pump comprises a base (1), a pump housing (2), a driving gear shaft (3), a driven gear shaft (4), two driving gears (5) and a pumping gear (6), wherein the pump housing (2) is fixedly connected to the left end of the upper surface of the base (1), the driving gear shaft (3) and the driven gear shaft (4) are respectively mounted at the upper and lower ends of the inner cavity of the pump housing (2) through bearings, the two driving gears (5) are respectively mounted on the outer walls of the driving gear shaft (3) and the driven gear shaft (4), and the two driving gears (5) are meshed with each other, and the pumping gear (6) is mounted on the right end of the driving gear shaft (3). The self-priming gear pump with liquid inlet blocking prevention further comprises: A temperature sensing probe (7) is mounted on the side wall of the water inlet of the pump casing (2); A filtering mechanism (8) is installed at the water inlet of the pump casing (2) to filter the fluid entering the pump casing (2); A power supply mechanism (9) is fixedly connected to the right end of the upper surface of the base (1), and the driving gear shaft (3) rotates through meshing transmission between the power supply mechanism (9) and the water pumping gear (6); The power supply mechanism (9) comprises: A drive box (91) fixedly connected to the right end of the upper surface of the base (1); A hydraulic cylinder (92) installed at the front end of the inner cavity of the drive box (91) along the front-to-back direction; A guide plate (93) is installed at the output end of the hydraulic cylinder (92), and the guide plate (93) is pushed forward and backward by the hydraulic cylinder (92). A guide groove (94) is formed on the outer wall of the guide plate (93); There are two slide bars (95), which are respectively vertically fixedly connected to the front and rear ends of the left side of the bottom of the inner cavity of the driving box (91); A lifting plate (96) is sleeved on the outer wall of the slide rod (95) so as to be able to slide up and down; A roller (97) is mounted on the bottom end of the right side wall of the lifting plate (96), and the roller (97) is inserted into the inner cavity of the guide groove (94); A rotating assembly (98) fixedly connected to the top of the lifting plate (96); A controller (99) is mounted on the front side of the rotating assembly (98), and the controller (99) is electrically connected to the temperature sensing probe (7).

2. A self-priming gear pump with anti-blocking function for liquid inlet according to claim 1, characterized in that: The filtering mechanism (8) comprises: A filter box (81) mounted on the water inlet of the pump casing (2); A filter screen (82) is installed at the top of the inner cavity of the filter box (81) to filter the fluid through the filter screen (82); A sleeve (83) is transversely mounted on the middle portion of the left side wall of the filter box (81), and a limiting groove (84) is provided on the inner wall of the sleeve (83) from left to right; A multi-stage electric telescopic rod (85) is transversely mounted on the left end of the sleeve (83), and the multi-stage electric telescopic rod (85) is externally connected to a timer to control the timing start of the multi-stage electric telescopic rod (85); A telescopic rod (86) is rotatably mounted on the output end of the multi-stage electric telescopic rod (85) via a bearing, and the telescopic rod (86) is plugged into the inner cavity of the sleeve (83); A limit block (87) is mounted on the left end of the outer wall of the telescopic rod (86), and the limit block (87) is inserted into the inner cavity of the limit groove (84); a brush (88) mounted on the right end of the telescopic rod (86), and the brush (88) is circular; An ejector pin (89) is mounted at the center of the right side wall of the brush (88); The storage assembly (810) is fixedly connected to the right side wall of the filter box (81).

3. A self-priming gear pump with anti-blocking function for liquid inlet according to claim 2, characterized in that: The limiting grooves (84) are distributed in a spiral shape on the inner wall of the sleeve (83).

4. A self-priming gear pump with anti-blocking function for liquid inlet according to claim 3, characterized in that: The storage assembly (810) comprises: A storage box (8101) fixedly connected to the right side wall of the filter box (81); A limit rod (8102) is installed transversely at the center of the right inner wall of the storage box (8101); The sliding sleeve (8103) and the spring (8104) are respectively sleeved on the left and right ends of the outer wall of the limiting rod (8102), and the sliding sleeve (8103) is pushed to move leftward under the elastic force of the spring (8104); The baffle (8105) is installed at the left end of the sliding sleeve (8103).

5. A self-priming gear pump with anti-blocking function for liquid inlet according to claim 4, characterized in that: The guide grooves (94) are distributed on the outer wall of the guide plate (93) from top to bottom and tilted toward the rear side.

6. A self-priming gear pump with anti-blocking function for liquid inlet according to claim 5, characterized in that: The rotating assembly (98) comprises: A housing (981) is fixedly connected to the top of the lifting plate (96), and the front side of the housing (981) is connected to the rear side of the controller (99); Two support shafts (982) are respectively mounted at the upper and lower ends of the inner cavity of the housing (981) through bearings; A first speed change gear (983) and a second speed change gear (984) are respectively mounted on the outer walls of the two support shafts (982), and both the first speed change gear (983) and the second speed change gear (984) can be meshedly connected with the water pumping gear (6); A motor (985) is mounted on the right side wall of the housing (981), and the motor (985) is electrically connected to the controller (99); The motor gear (986) is mounted on the output end of the motor (985), and the motor gear (986) is meshedly connected with the first speed change gear (983) and the second speed change gear (984).

7. A self-priming gear pump with anti-blocking function for liquid inlet according to claim 6, characterized in that: The transmission ratio between the first speed change gear (983) and the water pumping gear (6) is greater than 1, and the transmission ratio between the second speed change gear (984) and the water pumping gear (6) is less than 1.

Images