Vacuum pump negative pressure sealing valve and vacuum pump

Abstract

The vacuum pump negative pressure sealing valve and the vacuum pump comprise a vacuum pump body and a sealing valve body, the sealing valve body is connected with an air inlet of the vacuum pump body, and two blocking nets which are symmetrical left and right are fixedly connected in a valve cavity of the sealing valve body. A valve ball is arranged in a valve cavity of the sealing valve body, an adjusting mechanism for controlling the valve ball to move is arranged in a valve cover of the sealing valve body, and a connecting mechanism is arranged at one end of the outer wall of a valve body of the sealing valve body. According to the vacuum pump, the pull rope is wound through the rotation of the rotating rod, the wound pull rope can pull the valve ball towards the valve cover until the valve ball is pulled into the valve cover by the pull rope, and at the moment, external gas can enter the vacuum pump body through the valve body, so that the pressure in the vacuum pump body is the same as the external pressure; therefore, the pump body of the vacuum pump body can be prevented from being damaged in an internal vacuum environment.

Description

Technical Field

[0001] The utility model relates to the technical field of sealing valves, in particular to a vacuum pump negative pressure sealing valve and a vacuum pump. Background Art

[0002] A vacuum pump is a device used to generate negative pressure or vacuum in a closed environment, usually used to pump gas, liquid or suspended matter. Depending on the application field and requirements, a vacuum pump is usually used in conjunction with a negative pressure sealing valve. A vacuum pump negative pressure sealing valve is a valve used to maintain a vacuum environment. Its working principle is to use the friction between the negative pressure sealing ring and the end face to seal the gap in the pipeline, thereby achieving a sealing effect.

[0003] When the existing negative pressure sealing valve is in use, for example, the negative pressure sealing valve and vacuum pump of a vacuum pump with application number CN202320769947.3 can automatically discharge excess water in the vacuum pump, and then when the vacuum pump is started, the valve ball in the sealing valve can automatically block the sealing valve to form a negative pressure in the vacuum pump. However, when the vacuum pump stops working, the vacuum pump is still in a vacuum state, and the valve ball still blocks the channel of the sealing valve, so that the vacuum pump is always in a vacuum state. The long-term sealing state of the vacuum pump will damage the pump body of the vacuum pump. Moreover, when the sealing valve is connected to the vacuum pump, it is usually fixed with screws through a flange. The vibration generated when the vacuum pump is working will loosen the screws, resulting in water seepage at the flange connection. If the vacuum pump is extracting contaminated water, the dripping contaminated water will pollute the surrounding environment. Utility Model Content

[0004] The utility model aims to provide a vacuum pump negative pressure sealing valve and a vacuum pump to solve the problems raised in the above background technology.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] A negative pressure sealing valve for a vacuum pump comprises a sealing valve body, wherein two left-right symmetrical retaining nets are fixedly connected to the inside of the valve cavity of the sealing valve body, a valve ball is arranged inside the valve cavity of the sealing valve body, an adjusting mechanism for controlling the movement of the valve ball is arranged inside the valve cover of the sealing valve body, a connecting mechanism is arranged at one end of the outer wall of the valve body of the sealing valve body, the adjusting mechanism comprises a rotating rod rotating inside the valve cover, and a pull rope fixed to the valve ball is wound around the outer wall of the rotating rod.

[0007] Furthermore, the baffle on the right is away from the valve cover, the baffle on the left is flush with the left inner wall of the valve cover, a spring is fixedly connected between the valve ball and the baffle on the right, a worm gear is fixedly connected to the outer wall of the rotating rod, a worm screw 1 which is rotatably engaged with the worm gear 1 passes through the top of the valve cover, and a twist block is fixedly connected to the top of the worm screw 1.

[0008] Furthermore, the connecting mechanism includes two shells, and the opposite sides of the two shells are each provided with an arc-shaped notch that fits with the outer wall of the valve body, the inner wall of the arc-shaped notch is provided with an arc-shaped groove, and the inner wall of the arc-shaped groove is provided with grooves on both sides, a bidirectional screw is rotatably connected between the two grooves at relative positions, sliders are screwed together at both ends of the outer walls of the bidirectional screw, an arc plate is fixedly connected between the two sliders at relative positions, and a sealing gasket is fixedly connected to the inner wall of the arc-shaped groove and located in the middle of the arc-shaped groove.

[0009] Furthermore, one end of the bidirectional screw penetrates the shell at the corresponding position and is fixedly connected to a worm gear 2, two symmetrical fixed blocks are fixedly connected to the same side and opposite ends of the two shells, one side of the fixed block is rotatably connected to a worm gear 2 that meshes with the worm gear 2 at the corresponding position, a connecting rod is slidably sleeved between the two worm gears 2 at relative positions, one end of the two worm gears 2 located in the same shell penetrates the fixed blocks at the corresponding positions and are fixedly connected to a single-groove pulley, and the two single-groove pulleys are connected by a belt transmission.

[0010] Furthermore, both ends of the top and bottom surfaces of the shell are fixedly connected with moving blocks, a bidirectional screw rod is passed through and screwed between the two moving blocks at relative positions, one end of the bidirectional screw rod is fixedly connected with a double-groove pulley, and two adjacent double-groove pulleys are connected through belt transmission.

[0011] Preferably, a sealing gasket 2 is fixedly connected to the inner wall of the arc-shaped notch, and one end of one of the worm gears 2 and one end of one of the bidirectional lead screws are fixedly connected to a hexagonal block.

[0012] Compared with the prior art, the beneficial effects of the utility model are:

[0013] 1. The pull rope is reeled in by rotating the rotating rod. The reeled pull rope can pull the valve ball toward the valve cover until the valve ball is pulled into the valve cover by the pull rope. At this time, the external gas can enter the vacuum pump body through the valve body, making the pressure inside the vacuum pump body the same as the external pressure, thereby preventing the pump body of the vacuum pump body from being damaged in the internal vacuum environment;

[0014] 2. By closing the two shells and making the plane of the connection between the two shells parallel to the ground, the polluted water leaking between the sealing valve body and the vacuum pump body can be dripped into the shell below, thereby preventing the polluted water leaking from the vacuum pump body from dripping and polluting the environment when the polluted water is extracted. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0016] Figure 2 This is a schematic diagram of the internal structure of the sealing valve body in the utility model;

[0017] Figure 3 It is a schematic diagram of the structure of the regulating mechanism in the utility model;

[0018] Figure 4 It is a schematic diagram of the structure of the connecting mechanism in the utility model;

[0019] Figure 5 It is a schematic diagram of the interior of the shell in the utility model.

[0020] In the figure: 1. vacuum pump body; 2. sealing valve body; 21. baffle; 22. valve ball; 23. spring; 3. adjusting mechanism; 31. rotating rod; 32. pull rope; 33. worm gear 1; 34. worm gear 1; 4. connecting mechanism; 41. housing; 411. arc groove; 412. groove; 413. fixed block; 414. moving block; 42. bidirectional screw; 421. worm gear 2; 43. slider; 431. arc plate; 44. worm gear 2; 441. single groove pulley; 45. connecting rod; 46. bidirectional screw; 461. double groove pulley; 47. sealing gasket 1. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0022] See also Figures 1 to 5 In an embodiment of the utility model, a negative pressure sealing valve for a vacuum pump includes a vacuum pump body 1 and a sealing valve body 2, the sealing valve body 2 is connected to the air inlet of the vacuum pump body 1, two left-right symmetrical retaining nets 21 are fixedly connected inside the valve cavity of the sealing valve body 2, a valve ball 22 is arranged inside the valve cavity of the sealing valve body 2, an adjusting mechanism 3 for controlling the movement of the valve ball 22 is arranged inside the valve cover of the sealing valve body 2, a connecting mechanism 4 is arranged at one end of the outer wall of the valve body of the sealing valve body 2, the adjusting mechanism 3 includes a rotating rod 31 rotating inside the valve cover, and a pull rope 32 fixed to the valve ball 22 is wound around the outer wall of the rotating rod 31.

[0023] Specifically, firstly, the sealing valve body 2 is fixed to the air inlet of the vacuum pump body 1 through the connecting mechanism 4, and then water is poured into the vacuum pump body 1 until water flows out from the other end of the sealing valve body 2. When too much water is poured into the vacuum pump body 1, water will flow into the sealing valve body 2 from the air inlet of the vacuum pump body 1. Since the water inside the vacuum pump body 1 will form a pressure difference, the valve ball 22 will be pushed toward the valve cover until the valve ball 22 contacts the other baffle 21. The valve ball 22 floats under the action of water and is pushed into the valve cover. At this time, the excess water in the sealing valve body 2 will flow out from the other end of the sealing valve body 2 until no water flows out. At this time, the valve ball 22 falls into the valve body under the action of its own gravity. At the same time, under the elastic action of the spring 23, it returns to its original position to block the valve body to prevent external gas from flowing into the vacuum pump body 1, and then the vacuum pump body 1 is started. The impeller in the vacuum pump body 1 rotates to form a negative pressure inside the vacuum pump body 1, which can pump the polluted water to another area. When the vacuum pump body 1 is not used for a long time, in order to prevent the pump body of the vacuum pump body 1 from being damaged in the vacuum environment inside it, the pull rope 32 can be reeled in by rotating the rotating rod 31. The reeled pull rope 32 can pull the valve ball 22 toward the valve cover until the valve ball 22 is pulled into the valve cover by the pull rope 32. At this time, external gas can enter the vacuum pump body 1 through the valve body, so that the pressure inside the vacuum pump body 1 is the same as the external pressure.

[0024] Embodiment 1

[0025] like Figure 2-3 As shown, in this embodiment, the baffle 21 on the right is away from the valve cover, and the baffle 21 on the left is flush with the left inner wall of the valve cover, a spring 23 is fixedly connected between the valve ball 22 and the baffle 21 on the right, a worm gear 33 is fixedly connected to the outer wall of the rotating rod 31, a worm 34 meshing with the worm gear 33 is rotatably passed through the top of the valve cover, and a twist block is fixedly connected to the top of the worm 34.

[0026] In this embodiment, the rotating rod 31 can reel in the pull rope 32 by rotating the screw block, and the reeled pull rope 32 can pull the valve ball 22 toward the valve cover until the valve ball 22 is pulled into the valve cover by the pull rope 32. At this time, the external gas can enter the vacuum pump body 1 through the valve body, so that the pressure inside the vacuum pump body 1 is the same as the external pressure, thereby preventing the pump body of the vacuum pump body 1 from being damaged in its internal vacuum environment.

[0027] Embodiment 2

[0028] On the basis of the first embodiment, in order to prevent the leakage of polluted water at the connection between the sealing valve body 2 and the vacuum pump body 1.

[0029] like Figure 4-5As shown, in this embodiment, the connecting mechanism 4 includes two shells 41, and the opposite sides of the two shells 41 are each provided with an arc-shaped notch that fits with the outer wall of the valve body, and the inner wall of the arc-shaped notch is provided with an arc-shaped groove 411, and the inner walls of the arc-shaped groove 411 are provided with grooves 412 on both sides, and a bidirectional screw 42 is rotatably connected between the two grooves 412 at relative positions, and sliders 43 are screwed together at both ends of the outer walls of the bidirectional screw 42, and an arc plate 431 is fixedly connected between the two sliders 43 at relative positions, and a sealing gasket 47 is fixedly connected to the inner wall of the arc-shaped groove 411 and located in the middle of the arc-shaped groove 411.

[0030] In this embodiment, the flanges at the air inlet of the sealing valve body 2 and the vacuum pump body 1 are respectively clamped on two arc plates 431 at relative positions, and then the two shells 41 are brought close to each other, and the two shells 41 are temporarily not completely closed, and then the two arc plates 431 located on the same shell 41 are made close to each other by rotating the bidirectional screw 42, and the arc plates 431 approaching each other can pull the sealing valve body 2 toward the vacuum pump body 1 until the flange on the sealing valve body 2 and the flange at the air outlet of the vacuum pump body 1 are tightly attached to the two sealing gaskets 47 respectively, and then the two shells 41 are completely closed, at this time, the interior of the sealing valve body 2 is connected with the interior of the vacuum pump body 1, and before the two shells 41 are closed, the plane of the connection between the two shells 41 is parallel to the ground, so that the polluted water leaked between the sealing valve body 2 and the vacuum pump body 1 can be dripped into the shell 41 located below, thereby preventing the leaked polluted water from dripping and polluting the environment when the vacuum pump body 1 is extracting the polluted water.

[0031] like Figure 4-5 As shown, in the present embodiment, one end of the bidirectional screw 42 passes through the housing 41 at the corresponding position and is fixedly connected to a worm gear 421, two symmetrical fixed blocks 413 are fixedly connected to the same side and opposite ends of the two housings 41, one side of the fixed block 413 is rotatably connected to a worm 44 meshing with the worm gear 421 at the corresponding position, a connecting rod 45 is slidably sleeved between the insides of the two worm gears 44 at relative positions, wherein one end of the two worm gears 44 located at the same housing 41 passes through the fixed block 413 at the corresponding position and is fixedly connected to a single-groove pulley 441, and the two single-groove pulleys 441 are connected by a belt transmission.

[0032] In this embodiment, the rotation of one of the worm gears 44 can cause the other three worm gears 44 to rotate simultaneously, and the rotation of the worm gear 44 can cause the worm wheel 421 at the corresponding position to rotate, and the rotating worm wheel 421 can cause the bidirectional screw 42 at the corresponding position to rotate, so that the two arc plates 431 at the relative positions can be close to each other, and the arc plates 431 close to each other can pull the sealing valve body 2 toward the vacuum pump body 1, so as to facilitate the alignment of the flange on the sealing valve body 2 with the flange on the vacuum pump body 1.

[0033] like Figure 4 As shown, in this embodiment, both ends of the top and bottom surfaces of the shell 41 are fixedly connected with moving blocks 414, a bidirectional screw rod 46 is passed through and screwed between the two moving blocks 414 at relative positions, one end of the bidirectional screw rod 46 is fixedly connected with a double-groove pulley 461, and the two adjacent double-groove pulleys 461 are connected by belt transmission.

[0034] In this embodiment, the rotation of one of the bidirectional screw rods 46 can cause the other three bidirectional screw rods 46 to rotate simultaneously. The four bidirectional screw rods 46 that rotate simultaneously can make the two shells 41 approach each other, so that the two shells 41 can clamp the flange at the sealing valve body 2 and the flange at the air outlet of the vacuum pump body 1 between the two shells 41.

[0035] like Figure 4-5 As shown, in this embodiment, a sealing gasket 2 is fixedly connected to the inner wall of the arc-shaped notch, and one end of one of the worm gears 44 and one end of one of the two-way screws 46 are fixedly connected to a hexagonal block.

[0036] In this embodiment, the second sealing gasket can prevent polluted water from flowing out from between the two shells 41, and the hexagonal block makes it easier for workers to drive with an electric wrench.

[0037] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

[0038] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A vacuum pump negative pressure sealing valve, characterized in that: A sealing valve body, wherein two left-right symmetrical retaining nets are fixedly connected to the inside of the valve cavity of the sealing valve body, a valve ball is arranged inside the valve cavity of the sealing valve body, an adjusting mechanism for controlling the movement of the valve ball is arranged in the valve cover of the sealing valve body, a connecting mechanism is arranged at one end of the outer wall of the valve body of the sealing valve body, the adjusting mechanism comprises a rotating rod rotating in the valve cover, and a pull rope fixed to the valve ball is wound around the outer wall of the rotating rod.

2. A vacuum pump negative pressure sealing valve according to claim 1, characterized in that: The baffle on the right is away from the valve cover, and the baffle on the left is flush with the left inner wall of the valve cover. A spring is fixedly connected between the valve ball and the baffle on the right, a worm gear is fixedly connected to the outer wall of the rotating rod, a worm screw 1 that rotates and meshes with the worm gear 1 passes through the top of the valve cover, and a twist block is fixedly connected to the top of the worm screw 1.

3. A vacuum pump negative pressure sealing valve according to claim 1, characterized in that: The connecting mechanism includes two shells, and the opposite sides of the two shells are each provided with an arc-shaped notch that fits with the outer wall of the valve body, the inner wall of the arc-shaped notch is provided with an arc-shaped groove, and the inner wall of the arc-shaped groove is provided with grooves on both sides, a bidirectional screw is rotatably connected between the two grooves at relative positions, sliders are screwed together at both ends of the outer walls of the bidirectional screws, an arc plate is fixedly connected between the two sliders at relative positions, and a sealing gasket is fixedly connected to the inner wall of the arc-shaped groove and in the middle of the arc-shaped groove.

4. A vacuum pump negative pressure sealing valve according to claim 3, characterized in that: One end of the bidirectional screw penetrates the shell at the corresponding position and is fixedly connected to a worm gear 2, and two symmetrical fixed blocks are fixedly connected to the same side and opposite ends of the two shells, and one side of the fixed block is rotatably connected to a worm gear 2 that meshes with the worm gear 2 at the corresponding position, and a connecting rod is slidably sleeved between the two worm gears 2 at relative positions, wherein one end of the two worm gears 2 located in the same shell penetrates the fixed blocks at the corresponding positions and are fixedly connected to a single-groove pulley, and the two single-groove pulleys are connected by a belt transmission.

5. A vacuum pump negative pressure sealing valve according to claim 4, characterized in that: Both ends of the top and bottom surfaces of the shell are fixedly connected with moving blocks, a bidirectional screw rod is screwed through the two moving blocks at relative positions, one end of the bidirectional screw rod is fixedly connected with a double-groove pulley, and two adjacent double-groove pulleys are connected through belt transmission.

6. A vacuum pump negative pressure sealing valve according to claim 5, characterized in that: The inner wall of the arc-shaped notch is fixedly connected with a sealing gasket 2, and one end of one of the worm gears 2 and one end of one of the bidirectional screw rods are both fixedly connected with a hexagonal block.

7. A vacuum pump, characterized in that: A vacuum pump negative pressure sealing valve comprising the vacuum pump negative pressure sealing valve according to any one of claims 1 to 6.

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