Device for testing pumping speed of dry vacuum pump

Abstract

The utility model discloses a dry vacuum pump pumping speed testing device which comprises a base, two sides of the upper portion of the base are provided with oppositely matched sliding grooves, sliding seats horizontally slide on the inner sides of the sliding grooves, two ends of the upper portion of the base are fixedly provided with vacuum boxes, the lower ends of the inner side faces of the vacuum boxes are provided with trapezoidal insertion cylinders, and the upper ends of the sliding seats are provided with pump bodies in a positioning mode. One side, facing the vacuum box, of the pump body is provided with an air inlet pipe corresponding to the trapezoidal insertion cylinder and a flange plate positioned at the outer end part of the air inlet pipe; a connecting frame is horizontally and slidably installed between the vacuum boxes on the two sides, and avoiding openings corresponding to the air inlet pipes are formed in the two sides of the bottom of the connecting frame. The device further comprises a reciprocating driving assembly capable of driving the connecting frame to move in a reciprocating mode in the length direction of the base, the pump body can be rapidly positioned through the arranged positioning baffle, an air inlet pipe of the pump body can accurately correspond to a trapezoidal insertion cylinder of the vacuum box, manual repeated fine adjustment is not needed, and the testing efficiency of the device is further improved.

Description

Technical Field

[0001] The utility model relates to the technical field of vacuum pump testing, in particular to a dry vacuum pump pumping speed testing device. Background Technique

[0002] A dry mechanical pump refers to a mechanical vacuum pump that can start pumping from atmospheric pressure, can directly discharge the pumped gas into the atmosphere, has no oil or other working media in the pump cavity, and whose ultimate pressure is of the same order of magnitude as or close to that of an oil-sealed vacuum pump. When leaving the factory, it is necessary to test the relationship between the inlet pressure and the pumping speed. It is understood that the patent document with the publication number CN220687557U discloses a dry vacuum pump pumping speed testing device. Through the cooperation of a fixing plate, a motor, a connecting plate, a lead screw and a vacuum chamber, after inserting the input end part of the pump body into the opening in the lower half of the vacuum chamber, the motor can drive the connecting plate to move horizontally, so that the sealing layer fits tightly with the vacuum chamber.

[0003] The above device still has some deficiencies in actual application. Since the pump body is fixedly placed on the chassis, and the fixing plate is a flange fitting of the pump body, when the motor works and drives the connecting plate to move horizontally, it is necessary to drag the fixing plate and the pump body to move towards the vacuum chamber side, so that the sealing layer can fit tightly with the vacuum chamber. However, this also makes the driving component bear a large load, and it is easy to damage the driving component and the matching structure. Secondly, during the preparation period of the device, it is necessary to manually drag and lift the input end part of the pump body into the opening in the vacuum chamber, which is still time-consuming and laborious in operation, and it is also necessary to ensure that the input end of the pump body can accurately correspond to the lower opening of the vacuum chamber, thereby further reducing the testing efficiency of the device. Content of the Utility Model

[0004] The purpose of this part is to outline some aspects of the embodiments of the utility model and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this part, as well as in the abstract of the specification and the title of the utility model of this application, to avoid obscuring the purpose of this part, the abstract of the specification and the title of the utility model. However, such simplifications or omissions shall not be used to limit the scope of the utility model.

[0005] Therefore, the purpose of the utility model is to provide a dry vacuum pump pumping speed testing device to solve the problems raised in the above background technique, that is, the existing dry vacuum pump pumping speed testing device has a large load on its driving component during operation, which is easy to damage the driving component and the matching structure, and during the preparation period, it is necessary to manually drag and lift the input end part of the pump body into the opening in the vacuum chamber, which is still time-consuming and laborious, and it is also necessary to ensure that the input end of the pump body can accurately correspond to the lower opening of the vacuum chamber, further reducing the testing efficiency.

[0006] To achieve the above object, the present utility model provides the following technical solution: A dry vacuum pump pumping speed testing device, which includes a base. On both sides of the upper part of the base, there are opposed and cooperating chutes. Inside the chutes, a sliding seat slides horizontally. At both ends of the upper part of the base, a vacuum box is fixed. At the lower end of the inner side of the vacuum box, there is a trapezoidal insertion cylinder. On the upper end of the sliding seat, a pump body is positioned and placed. On one side of the pump body facing the vacuum box, there is an air inlet pipe corresponding to the trapezoidal insertion cylinder and a flange at the outer end of the air inlet pipe;

[0007] A connecting frame is horizontally slidably installed between the two vacuum boxes on both sides. On both sides of the bottom of the connecting frame, there are avoidance openings corresponding to the air inlet pipes;

[0008] Among them, it further includes a reciprocating drive assembly that can drive the connecting frame to reciprocate along the length direction of the base.

[0009] As a preferred solution of a dry vacuum pump pumping speed testing device according to the present utility model, on the upper end of the sliding seat, a positioning baffle is further provided, and the positioning baffle is adapted to the contour of the pump body base.

[0010] As a preferred solution of a dry vacuum pump pumping speed testing device according to the present utility model, one end of the trapezoidal insertion cylinder connected to the vacuum box is the large-diameter end, and a rubber sleeve is further provided on the outer peripheral side of the trapezoidal insertion cylinder;

[0011] Among them, the maximum outer diameter of the trapezoidal insertion cylinder is greater than the inner diameter of the air inlet pipe, and the minimum outer diameter is less than the inner diameter of the air inlet pipe.

[0012] As a preferred solution of a dry vacuum pump pumping speed testing device according to the present utility model, a plurality of guide rods are fixedly connected between the two vacuum boxes on both sides, and sliding sleeves that are slidably matched with the guide rods are further provided on both sides of the connecting frame.

[0013] As a preferred solution of a dry vacuum pump pumping speed testing device according to the present utility model, a top frame is fixedly connected to the upper ends of the two vacuum boxes on both sides, and a ball-type nut is provided at the center of the top of the connecting frame;

[0014] The reciprocating drive assembly includes a threaded lead screw rotatably installed at both ends inside the top frame and threadedly connected to the ball-type nut, and a motor provided on one side of the top frame and having an output shaft connected to one end of the threaded lead screw.

[0015] As a preferred solution of a dry vacuum pump pumping speed testing device according to the present utility model, an air inlet is further provided on the upper part of the inner side of the vacuum box, and sealing plugs corresponding to the air inlets are provided on both sides of the connecting frame.

[0016] As a preferred embodiment of a dry vacuum pump pumping speed testing device described in the present utility model, a vacuum gauge and a flow meter are further provided on the vacuum chamber.

[0017] Compared with the prior art, the beneficial effects of the present utility model are as follows: For this dry vacuum pump pumping speed testing device, during testing, the pump body is placed on the sliding seat and quickly positioned with the cooperation of the positioning baffle, enabling the intake pipe to accurately correspond to the trapezoidal insertion cylinder of the vacuum chamber. There is no need for manual repeated fine-tuning, which improves the operation efficiency. Subsequently, the reciprocating drive assembly drives the connecting frame to move horizontally with the cooperation of the sliding assembly. The connecting frame can drive the pump body and the sliding seat to slide to one side through the avoidance opening and the flange, so that the trapezoidal insertion cylinder directly abuts into the intake pipe, and the hole is sealed with the cooperation of the rubber sleeve. At this time, the pumping speed test of the pump body can be carried out; compared with the existing testing devices, it can effectively prevent damage to the drive assembly and the matching structure caused by excessive linkage load, has a more reasonable structure, can quickly position the interface between the pump body and the vacuum chamber, saves time and effort, and effectively improves the testing efficiency of the device under mutual cooperation. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 External structural schematic diagram of the testing part of the present utility model;

[0019] Figure 2 Overall front view structural schematic diagram of the present utility model;

[0020] Figure 3 Structural schematic diagram of the connecting frame of the present utility model;

[0021] Figure 4 Structural schematic diagram of the trapezoidal insertion cylinder of the present utility model.

[0022] In the figure: 100, base; 110, chute; 200, sliding seat; 210, positioning baffle; 300, vacuum chamber; 310, trapezoidal insertion cylinder; 311, rubber sleeve; 320, air inlet; 330, vacuum gauge; 340, flow meter; 350, guide rod; 400, connecting frame; 401, avoidance opening; 410, sealing plug; 420, sliding sleeve; 430, ball screw nut; 500, top frame; 600, reciprocating drive assembly; 610, threaded lead screw; 620, motor; 700, pump body; 710, intake pipe; 720, flange. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0023] In order to make the above objects, features, and advantages of the present utility model more obvious and understandable, the following detailed description of the specific embodiments of the present utility model is made in conjunction with the accompanying drawings.

[0024] Secondly, the present utility model will be described in detail with reference to the schematic diagrams. When detailing the embodiments of the present utility model, for the convenience of description, the cross-sectional views showing the device structure will be enlarged locally in a non-general proportion, and the schematic diagrams are only examples and should not limit the scope of protection of the present utility model herein. In addition, in actual production, three-dimensional spatial dimensions including length, width, and depth should be included.

[0025] To make the objectives, technical solutions, and advantages of the present utility model clearer, the embodiments of the present utility model will be further described in detail below with reference to the accompanying drawings.

[0026] Figures 1-4 Shown is the entire structural schematic diagram of a dry vacuum pump pumping speed testing device of the present utility model. Please refer to Figures 1-4 , a dry vacuum pump pumping speed testing device of this embodiment includes a base 100. On both sides of the upper part of the base 100, there are opposing and cooperating chutes 110. A sliding seat 200 slides horizontally inside the chutes 110. At both ends of the upper part of the base 100, a vacuum chamber 300 is fixed. At the lower end of the inner side of the vacuum chamber 300, there is a trapezoidal insertion cylinder 310. On the upper end of the sliding seat 200, a pump body 700 is placed in a positioned manner. On one side of the pump body 700 facing the vacuum chamber 300, there is an intake pipe 710 corresponding to the trapezoidal insertion cylinder 310 and a flange 720 located at the outer end of the intake pipe 710; between the two vacuum chambers 300, a connecting frame 400 is slidably installed horizontally. On both sides of the bottom of the connecting frame 400, there are avoidance openings 410 corresponding to the intake pipes 710; among them, there is also a reciprocating drive assembly 600 that can drive the connecting frame 400 to reciprocate along the length direction of the base 100; a vacuum gauge 330 and a flow meter 340 are also provided on the vacuum chamber 300.

[0027] A positioning baffle 210 is also provided on the upper end of the sliding seat 200, and the positioning baffle 210 is adapted to the contour of the base of the pump body 700. It can be understood that by providing the positioning baffle 210, the position of the pump body 700 can be quickly positioned, so that the intake pipe 710 of the pump body 700 can accurately correspond to the trapezoidal insertion cylinder 310 of the vacuum chamber 300, without the need for manual repeated fine-tuning, further improving the testing efficiency of the device.

[0028] One end of the trapezoidal insertion cylinder 310 connected to the vacuum chamber 300 is the large-diameter end, and a rubber sleeve 311 is also provided on the outer peripheral side of the trapezoidal insertion cylinder 310. Among them, the maximum outer diameter of the trapezoidal insertion cylinder 310 is greater than the inner diameter of the intake pipe 710, and the minimum outer diameter is less than the inner diameter of the intake pipe 710. By providing the trapezoidal insertion cylinder 310 with a large inner end and a small outer end, the trapezoidal insertion cylinder 310 can directly abut into the intake pipe 710 during the movement of the pump body 700, and effective sealing can be achieved with the cooperation of the rubber sleeve 311, ensuring the smooth progress of the test. When disassembling, it can be directly pulled out, with simple operation and no need for additional steps such as sleeving a fixing plate.

[0029] A plurality of guide rods 350 are also fixedly connected between the two vacuum chambers 300. Sliding sleeves 420 that are slidably matched with the guide rods 350 are also arranged on both sides of the connecting frame 400. The cooperation between the sliding sleeves 420 and the guide rods 350 enables the connecting frame 400 to move more linearly and stably horizontally left and right, which is beneficial to the good operation of the device. A top frame 500 is fixedly connected to the upper ends of the two vacuum chambers 300. A ball nut 430 is arranged at the center of the top of the connecting frame 400; the reciprocating drive assembly 600 includes a threaded lead screw 610 whose two ends are rotatably installed inside the top frame 500 and is threadedly connected to the ball nut 430, and a motor 620 arranged on one side of the top frame 500 and whose output shaft is connected to one end of the threaded lead screw 610. During use, the motor 620 drives the threaded lead screw 610, and with the cooperation of the ball nut 430 and the sliding assembly, the connecting frame 400 is driven to move horizontally left or right; specifically, in this embodiment, when a vacuum pump needs to be tested, the pump body 700 is placed on the sliding seat 200 and quickly positioned with the cooperation of the positioning baffle 210, so that the intake pipe 710 can accurately correspond to the trapezoidal insertion cylinder 310 of the vacuum chamber 300, without manual repeated fine-tuning, improving the operation efficiency. Subsequently, the reciprocating drive assembly 600 drives the connecting frame 400 to move horizontally with the cooperation of the sliding assembly. The connecting frame 400 can drive the pump body 700 and the sliding seat 200 to slide to one side through the avoidance opening 401 and the flange 720, so that the trapezoidal insertion cylinder 310 directly abuts into the intake pipe 710, and the hole is sealed with the cooperation of the rubber sleeve 311. At this time, the pumping speed test of the pump body can be carried out; after the test is completed, the motor 620 reverses and drives the pump body 700 to disengage from the vacuum chamber 300, and the pump body 700 on the other side can be docked with the corresponding vacuum chamber 300 and the pumping speed detected under the drive of the connecting frame 400. During this process, the tested pump body 700 can be removed and a new pump body 700 can be replaced, improving the pumping speed test efficiency of the vacuum pump; in summary, compared with the existing test device, it can effectively prevent damage to the drive assembly and the matching structure caused by excessive linkage load, the structure is more reasonable, it can quickly position the interface between the pump body 700 and the vacuum chamber 300, saving time and effort, and effectively improving the test efficiency of the device with mutual cooperation.

[0030] Further, an air inlet 320 is also provided on the upper part of the inner side of the vacuum chamber 300. Sealing plugs 410 corresponding to the air inlet 320 are arranged on both sides of the connecting frame 400. When the test of the pump body 700 is completed, the connecting frame 400 will drive it to disengage from the vacuum chamber 300. At this time, the sealing plugs 410 will first disengage from the air inlet 320. In this way, the internal pressure of the vacuum chamber 300 can automatically return to normal pressure, so as to facilitate the next side test, and at the same time prevent the situation that it is difficult to pull out the pump body 700 due to excessive negative pressure in the vacuum chamber.

[0031] In summary, for a dry vacuum pump pumping speed test device according to this embodiment, when it is necessary to test the vacuum pump, the pump body 700 is placed on the sliding seat 200 and quickly positioned with the cooperation of the positioning baffle 210, so that the intake pipe 710 can accurately correspond to the trapezoidal insertion cylinder 310 of the vacuum chamber 300. There is no need for manual repeated fine-tuning, which improves the operation efficiency. Subsequently, the reciprocating drive assembly 600 drives the connecting frame 400 to move horizontally with the cooperation of the sliding assembly. The connecting frame 400 can drive the pump body 700 and the sliding seat 200 to slide to one side through the avoidance port 401 and the flange 720, so that the trapezoidal insertion cylinder 310 directly abuts into the intake pipe 710, and the hole is sealed with the cooperation of the rubber sleeve 311. At this time, the pumping speed test of the pump body can be carried out; after the test is completed, the motor 620 rotates in reverse and drives the pump body 700 to be separated from the vacuum chamber 300, while the pump body 700 on the other side can be docked with the corresponding vacuum chamber 300 and the pumping speed can be detected under the drive of the connecting frame 400. During this process, the tested pump body 700 can be removed and a new pump body 700 can be replaced, which improves the pumping speed test efficiency of the vacuum pump; compared with the existing test device, it can effectively prevent damage to the drive assembly and the matching structure caused by excessive linkage load, and the structure is more reasonable.

[0032] Although the present invention has been described above with reference to the embodiments, various improvements can be made to it and components therein can be replaced with equivalents without departing from the scope of the present invention. In particular, as long as there is no structural conflict, the various features in the embodiments disclosed in the present invention can be combined with each other in any way. The exhaustive description of these combinations is not given in this specification only for the sake of saving space and resources. Therefore, the present invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A dry vacuum pump pumping speed test device, characterized in that It includes a base (100). On both sides of the upper part of the base (100), there are opposed and cooperating chute grooves (110). Inside the chute grooves (110), a sliding seat (200) slides horizontally. At both ends of the upper part of the base (100), a vacuum chamber (300) is fixed. At the lower end of the inner side of the vacuum chamber (300), there is a trapezoidal insertion cylinder (310). On the upper end of the sliding seat (200), a pump body (700) is placed in a positioned manner. On one side of the pump body (700) facing the vacuum chamber (300), there is an air inlet pipe (710) corresponding to the trapezoidal insertion cylinder (310) and a flange plate (720) located at the outer end of the air inlet pipe (710). A connecting frame (400) is slidably installed horizontally between the two vacuum chambers (300). At both sides of the bottom of the connecting frame (400), there are avoidance openings (401) corresponding to the air inlet pipes (710). Among them, it further includes a reciprocating drive assembly (600) that can drive the connecting frame (400) to reciprocate along the length direction of the base (100).

2. The dry vacuum pump pumping speed testing device according to claim 1, characterized in that: A positioning baffle (210) is further provided at the upper end of the sliding seat (200), and the positioning baffle (210) is adapted to the base contour of the pump body (700).

3. The dry vacuum pump pumping speed test device according to claim 1, wherein: One end of the trapezoidal insertion cylinder (310) connected to the vacuum chamber (300) is the large-diameter end, and a rubber sleeve (311) is further provided on the outer peripheral side of the trapezoidal insertion cylinder (310). Among them, the maximum outer diameter of the trapezoidal insertion cylinder (310) is greater than the inner diameter of the air inlet pipe (710), and the minimum outer diameter is less than the inner diameter of the air inlet pipe (710).

4. A dry vacuum pump pumping speed test device according to claim 1, characterized in that: A plurality of guide rods (350) are fixedly connected between the two vacuum chambers (300). Sliding sleeves (420) that are slidably matched with the guide rods (350) are further provided on both sides of the connecting frame (400).

5. The dry vacuum pump pumping speed test device according to claim 1, characterized in that: The upper ends of the two vacuum chambers (300) are fixedly connected with a top frame (500). A ball-type nut (430) is provided at the center of the top of the connecting frame (400). The reciprocating drive assembly (600) includes a threaded lead screw (610) rotatably installed at both ends inside the top frame (500) and threadedly connected to the ball-type nut (430), and a motor (620) provided on one side of the top frame (500) and with an output shaft connected to one end of the threaded lead screw (610).

6. The dry vacuum pump pumping speed testing device according to claim 1, characterized in that: An air inlet (320) is further provided on the upper part of the inner side of the vacuum chamber (300). Sealing plugs (410) corresponding to the air inlet (320) are provided on both sides of the connecting frame (400).

7. A dry vacuum pump pumping speed test device according to claim 1, characterized in that: A vacuum gauge (330) and a flow meter (340) are further provided on the vacuum chamber (300).

Images