Claw-shaped dry vacuum pump

Abstract

The utility model relates to the technical field of vacuum pumps, and provides a claw-shaped dry vacuum pump which comprises a bottom plate and a claw-shaped dry vacuum pump body, and the bottom plate is fixedly connected with the claw-shaped dry vacuum pump body. The controller controls the motor to start, the output shaft of the motor drives the cam to rotate, the round ball, the connecting plate, the U-shaped rod, the filter screen plate and the rotating rod rotate upwards by a proper angle through rotation of the cam, the torsion spring is made to twist synchronously, and under the reset acting force of the torsion spring, the rotating rod can drive the filter screen plate to rotate reversely. By repeating the steps, the filter screen plate can be vibrated repeatedly, and the impurity particles roll down along the inclined surface of the filter screen plate, so that the impurity particles can be prevented from being adsorbed on the filter screen plate due to negative pressure generated by a claw-shaped rotor in the claw-shaped dry vacuum pump body, and the condition that the impurity particles are accumulated on the filter screen plate is avoided; and therefore, the air inflow of the claw-shaped dry vacuum pump body is ensured.

Description

Technical Field

[0001] This utility model relates to the field of vacuum pump technology, and in particular to a claw-shaped dry vacuum pump. Background Technology

[0002] Claw-type dry vacuum pumps, as a highly efficient and environmentally friendly vacuum extraction device, play a vital role in modern industry. Employing an oil-free design, claw-type dry vacuum pumps utilize a special claw-shaped rotor structure to create a sealed cavity within the pump chamber through volume changes, completing the gas intake, compression, and exhaust processes. With advancements in technology and industrial development, claw-type dry vacuum pumps have been widely applied in various fields such as petrochemicals, pharmaceuticals, food, electronics, and aerospace, becoming an indispensable piece of equipment in modern industry.

[0003] In the prior art, such as Chinese Patent No. CN218266536U, a low-noise dry vacuum pump is disclosed in the field of vacuum pump technology. It includes a motor, a gearbox installed at the output end of the motor, a pump body connected to one end of the gearbox, an air inlet channel installed on the top of the pump body, a threaded pipe connected to the top of the air inlet channel via a connecting thread, a spherical filter screen welded to the top of the threaded pipe, and a shaped dust collection hood fixedly at an angle to the surface of the air inlet channel. The shaped dust collection hood includes a horizontal part set on the bottom surface, with a bayonet and a connection port sequentially opened inside the horizontal part, and a dust collection pipe being snapped into the connection port. This utility model, by setting a spherical filter screen, effectively avoids impurities remaining on the filter screen. Simultaneously, the angled shaped dust collection hood can centrally collect impurities. By cooperating with the dust collection pipe to transport impurities, the collection box can quantitatively observe the amount of impurities over a period of time after collection, thereby determining the usage level of the spherical filter screen and facilitating the improvement of the accuracy of daily maintenance of vacuum pump parts.

[0004] While the above solution has the advantages mentioned above, its disadvantages are as follows: Although it can create negative pressure at the bayonet by activating the vacuum pump inside the collection box to collect impurities from the irregularly shaped dust collection hood into the collection box, and the negative pressure generated by the vacuum pump inside the collection box is less than the negative pressure generated by the impeller inside the pump body, even if both work simultaneously, the vacuum pump will not affect the airflow attracted by the air intake channel. However, because the negative pressure generated by the vacuum pump is less than the negative pressure generated by the impeller inside the pump body, some impurities adsorbed on the surface of the spherical filter screen are difficult to detach. Under the condition of long-term operation of the vacuum pump, the impurities adsorbed on the surface of the spherical filter screen will gradually accumulate, thereby affecting the air intake of the vacuum pump. Utility Model Content

[0005] The purpose of this invention is to solve the problem in the existing technology that, although the vacuum pump in the collection box can create negative pressure at the bayonet to collect impurities from the irregularly shaped dust collection hood into the collection box, and the negative pressure generated by the vacuum pump in the collection box is less than the negative pressure generated by the impeller in the pump body, even if both work simultaneously, the vacuum pump does not affect the airflow in the intake channel. However, because the negative pressure generated by the vacuum pump is less than the negative pressure generated by the impeller in the pump body, some impurities adsorbed on the surface of the spherical filter screen are difficult to detach. Under long-term operation, the impurities adsorbed on the surface of the spherical filter screen will gradually accumulate, thereby affecting the air intake of the vacuum pump.

[0006] To achieve the above objectives, this utility model adopts the following technical solution: a claw-shaped dry vacuum pump, comprising: a base plate and a claw-shaped dry vacuum pump body, wherein the base plate is fixedly connected to the claw-shaped dry vacuum pump body, and an air inlet pipe is fixedly connected to the top of the claw-shaped dry vacuum pump body, and further comprising:

[0007] An air intake frame is fixedly connected to one end of the air intake pipe. A filter screen is movably installed on the inner wall of the air intake frame. Two U-shaped rods are symmetrically fixedly connected to the top of the filter screen. A connecting plate is fixedly connected to one end of each U-shaped rod. A ball is fixedly connected to one side of the two connecting plates. A motor is fixedly connected to one side of the air intake frame. A cam is fixedly connected to the output shaft of the motor. Rotary rods are rotatably connected to opposite sides of the bottom of the air intake frame. Both rotary rods are fixedly connected to the filter screen. A torsion spring is provided on the outer surface of the rotary rod. The torsion spring is fixedly connected to the rotary rod and the air intake frame respectively.

[0008] Preferably, two fixing blocks are symmetrically fixedly connected to the side of the air intake frame near the top, and a guide groove is provided on the top of the fixing block. The outer surface of the U-shaped rod is movably connected to the inside of the guide groove.

[0009] Preferably, the air inlet frame has a discharge port on the other side near the bottom, and a guide pipe is fixedly connected to the other side of the air inlet frame near the bottom. The air inlet frame, the discharge port and the guide pipe are connected to each other.

[0010] Preferably, a collection box is fixedly connected to the top of the claw-shaped dry vacuum pump body, the collection box is fixedly connected to the guide pipe, and the guide pipe and the collection box are connected in communication.

[0011] Preferably, a collection frame is slidably connected to one side of the collection box, and a handle is fixedly connected to one side of the collection frame.

[0012] Preferably, a second sealing rubber sheet is fixedly connected to one side of the filter screen near the top, and one side of the second sealing rubber sheet is fixedly connected to the inner wall of the air intake frame near the top.

[0013] Preferably, a sealing rubber sheet is fixedly connected to the bottom of the filter screen, and one side of the sealing rubber sheet is fixedly connected to the bottom of the inner wall of the air intake frame. The filter screen is inclined.

[0014] Compared with the prior art, the advantages and positive effects of this utility model are as follows:

[0015] 1. This utility model uses a controller to start a motor, causing its output shaft to drive a cam to rotate. The rotation of the cam applies an upward force to the ball, causing the ball, connecting plate, U-shaped rod, filter screen, and rotating rod to rotate upward at an appropriate angle. This allows the U-shaped rod to slide a suitable distance inside the guide groove. The fixed block and guide groove limit and guide the U-shaped rod, simultaneously causing the torsion spring to twist. When the pressure of the cam on the ball weakens or disappears, the torsion spring's reset force causes the rotating rod to drive the filter screen to rotate in the opposite direction, resetting the U-shaped rod, connecting plate, and ball. This process repeats, causing the filter screen to vibrate repeatedly, causing impurity particles to roll down the inclined surface of the filter screen. This prevents impurity particles from being adsorbed onto the filter screen by the negative pressure generated by the claw rotor inside the claw-shaped dry vacuum pump body, thus avoiding the accumulation of impurity particles on the filter screen and ensuring the air intake of the claw-shaped dry vacuum pump body.

[0016] 2. This utility model allows impurity particles to enter the guide pipe from the discharge port and then enter the collection box through the guide pipe, falling into the inside of the collection frame. The collection frame collects the impurity particles, and the collection frame can be removed by the handle. This makes it convenient and simple to centrally process the impurity particles. Attached Figure Description

[0017] Figure 1 A side view of the structure of a claw-shaped dry vacuum pump provided by this utility model;

[0018] Figure 2 A partial structural schematic diagram of a claw-shaped dry vacuum pump provided by this utility model;

[0019] Figure 3 This utility model provides a claw-shaped dry vacuum pump. Figure 2 Enlarged structural diagram at point A in the middle;

[0020] Figure 4 This is a partial cross-sectional structural diagram of a claw-shaped dry vacuum pump provided by the present invention.

[0021] Legend:

[0022] 1. Base plate; 101. Claw-shaped dry vacuum pump body; 102. Inlet pipe; 2. Inlet frame; 201. Filter screen; 202. U-shaped rod; 203. Connecting plate; 204. Ball; 205. Cam; 206. Motor; 207. Fixing block; 208. Guide groove; 209. Rotating rod; 210. Torsion spring; 211. Sealing rubber sheet one; 212. Discharge port; 213. Sealing rubber sheet two; 3. Collection box; 301. Guide pipe; 302. Collection frame; 303. Handle. Detailed Implementation

[0023] To better understand the above-mentioned objectives, features, and advantages of this utility model, the present utility model will be further described below with reference to the accompanying drawings and embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0024] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the present invention is not limited to the specific embodiments disclosed in the following specification.

[0025] Examples, such as Figure 1-4 As shown, this utility model provides a claw-shaped dry vacuum pump, including: a base plate 1 and a claw-shaped dry vacuum pump body 101. The base plate 1 is fixedly connected to the claw-shaped dry vacuum pump body 101. An air inlet pipe 102 is fixedly connected to the top of the claw-shaped dry vacuum pump body 101. It also includes: an air inlet frame 2, fixedly connected to one end of the air inlet pipe 102. A filter screen 201 is movably arranged on the inner wall of the air inlet frame 2. Two U-shaped rods 202 are symmetrically fixedly connected to the top of the filter screen 201. One end is fixedly connected to a connecting plate 203, and two balls 204 are fixedly connected to opposite sides of the two connecting plates 203. One side of the air intake frame 2 is fixedly connected to a motor 206, and the output shaft of the motor 206 is fixedly connected to a cam 205. Two rotating rods 209 are rotatably connected to opposite sides of the bottom of the air intake frame 2. Both rotating rods 209 are fixedly connected to the filter screen plate 201. A torsion spring 210 is provided on the outer surface of the rotating rod 209. The torsion spring 210 is fixedly connected to the rotating rod 209 and the air intake frame 2 respectively.

[0026] Furthermore, such as Figure 1-4 As shown, two fixing blocks 207 are symmetrically fixedly connected to the side of the air intake frame 2 near the top. The top of the fixing block 207 is provided with a guide groove 208. The outer surface of the U-shaped rod 202 is movably connected to the inside of the guide groove 208. The fixing block 207 and the guide groove 208 serve to limit and guide the U-shaped rod 202.

[0027] Furthermore, such as Figure 1-4As shown, a discharge port 212 is provided on the other side of the air intake frame 2 near the bottom, and a guide pipe 301 is fixedly connected to the other side of the air intake frame 2 near the bottom. The air intake frame 2, the discharge port 212 and the guide pipe 301 are connected. With the above arrangement, it is convenient for impurity particles inside the air intake frame 2 to enter the guide pipe 301 through the discharge port 212.

[0028] Furthermore, such as Figure 1-4 As shown, a collection box 3 is fixedly connected to the top of the claw-shaped dry vacuum pump body 101. The collection box 3 is fixedly connected to the guide pipe 301, and the guide pipe 301 and the collection box 3 are connected. The guide pipe 301 facilitates the falling of impurity particles into the collection box 3.

[0029] Furthermore, such as Figure 1-4 As shown, a collection frame 302 is slidably connected to one side of the collection box 3, and a handle 303 is fixedly connected to one side of the collection frame 302. The handle 303 makes it easy to pull out the collection frame 302.

[0030] Furthermore, such as Figure 1-4 As shown, a sealing rubber sheet 213 is fixedly connected to one side of the filter screen 201 near the top. One side of the sealing rubber sheet 213 is fixedly connected to the inner wall of the air intake frame 2 near the top. The sealing rubber sheet 213 achieves a certain sealing effect.

[0031] Furthermore, such as Figure 1-4 As shown, a sealing rubber sheet 211 is fixedly connected to the bottom of the filter screen plate 201. One side of the sealing rubber sheet 211 is fixedly connected to the bottom of the inner wall of the air intake frame 2. The filter screen plate 201 is set at an angle. The sealing rubber sheet 211 achieves a certain sealing effect.

[0032] Working principle: During operation, when the claw-shaped dry vacuum pump body 101 is running, gas enters the inlet pipe 102 from the inlet frame 2. Impurities in the gas are filtered by the filter screen 201. Simultaneously, the controller starts the motor 206, causing its output shaft to drive the cam 205 to rotate. The rotation of the cam 205 applies an upward force to the ball 204, causing the ball 204, connecting plate 203, U-shaped rod 202, filter screen 201, and rotating rod 209 to move in opposite directions. Rotate the U-shaped rod 202 at an appropriate angle so that it slides a suitable distance inside the guide groove 208. The fixing block 207 and the guide groove 208 serve to limit and guide the U-shaped rod 202, simultaneously causing the torsion spring 210 to twist. When the squeezing force of the cam 205 on the ball 204 weakens or disappears, the restoring force of the torsion spring 210 causes the rotating rod 209 to drive the filter screen plate 201 to rotate in the opposite direction, causing the U-shaped rod 202, connecting plate 203, and ball 204 to... 04. Reset, repeat this process, which makes the filter screen plate 201 vibrate repeatedly, causing impurity particles to roll down the slope of the filter screen plate 201. This avoids the impurity particles being adsorbed onto the filter screen plate 201 by the negative pressure generated by the claw rotor inside the claw dry vacuum pump body 101, thus preventing the accumulation of impurity particles on the filter screen plate 201 and ensuring the air intake of the claw dry vacuum pump body 101. Under the action of the sealing rubber sheet 213 and sealing rubber sheet 211, a certain sealing effect can be achieved, preventing impurity particles from entering the bottom of the air intake frame 2 through the gap between the filter screen plate 201 and the air intake frame 2. The impurity particles enter the guide pipe 301 from the discharge port 212, and then enter the collection box 3 through the guide pipe 301, falling into the inside of the collection frame 302. The collection frame 302 collects the impurity particles. The collection frame 302 can be removed by the handle 303, which facilitates the centralized processing of impurity particles and is relatively simple and convenient.

[0033] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any other way. Any person skilled in the art may make changes or modifications to the above-disclosed technical content to create equivalent embodiments for application in other fields. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present utility model without departing from the technical solution of the present utility model shall still fall within the protection scope of the technical solution of the present utility model.

Claims

1. A claw-shaped dry vacuum pump, comprising: The base plate (1) and the claw-shaped dry vacuum pump body (101) are fixedly connected, wherein the base plate (1) and the claw-shaped dry vacuum pump body (101) are fixedly connected, and an air inlet pipe (102) is fixedly connected to the top of the claw-shaped dry vacuum pump body (101). The feature is that it further includes: An air intake frame (2) is fixedly connected to one end of the air intake pipe (102). A filter screen plate (201) is movably provided on the inner wall of the air intake frame (2). Two U-shaped rods (202) are symmetrically fixedly connected to the top of the filter screen plate (201). A connecting plate (203) is fixedly connected to one end of the U-shaped rod (202). A ball (204) is fixedly connected to the opposite side of the two connecting plates (203). A motor (206) is fixedly connected to one side of the air intake frame (2). A cam (205) is fixedly connected to the output shaft of the motor (206). Rotating rods (209) are rotatably connected to opposite sides of the bottom of the air intake frame (2). Both rotating rods (209) are fixedly connected to the filter screen plate (201). A torsion spring (210) is provided on the outer surface of the rotating rod (209). The torsion spring (210) is fixedly connected to the rotating rod (209) and the air intake frame (2) respectively.

2. The claw-shaped dry vacuum pump according to claim 1, characterized in that: Two fixing blocks (207) are symmetrically fixed to one side of the air intake frame (2) near the top. The top of the fixing block (207) is provided with a guide groove (208), and the outer surface of the U-shaped rod (202) is movably connected to the inside of the guide groove (208).

3. A claw-shaped dry vacuum pump according to claim 2, characterized in that: The air inlet frame (2) has a discharge port (212) on the other side near the bottom, and a guide pipe (301) is fixedly connected to the other side near the bottom of the air inlet frame (2). The air inlet frame (2), the discharge port (212) and the guide pipe (301) are connected to each other.

4. A claw-shaped dry vacuum pump according to claim 3, characterized in that: The top of the claw-shaped dry vacuum pump body (101) is fixedly connected to a collection box (3), the collection box (3) is fixedly connected to a guide pipe (301), and the guide pipe (301) and the collection box (3) are connected.

5. A claw-shaped dry vacuum pump according to claim 4, characterized in that: A collection frame (302) is slidably connected to one side of the collection box (3), and a handle (303) is fixedly connected to one side of the collection frame (302).

6. A claw-shaped dry vacuum pump according to claim 3, characterized in that: A sealing rubber sheet (213) is fixedly connected to one side of the filter screen (201) near the top, and one side of the sealing rubber sheet (213) is fixedly connected to the inner wall of the air intake frame (2) near the top.

7. A claw-shaped dry vacuum pump according to claim 6, characterized in that: The bottom of the filter screen (201) is fixedly connected to a sealing rubber sheet (211), and one side of the sealing rubber sheet (211) is fixedly connected to the bottom of the inner wall of the air intake frame (2). The filter screen (201) is set at an angle.

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