Water pump with novel sealing structure

Abstract

The utility model relates to the technical field of water pump sealing, in particular to a water pump with a novel sealing structure. The utility model provides a water pump with a novel sealing structure. The water pump comprises a pump body, a pump cover and a water-swelling water stop rubber strip, a groove is formed in the middle opening face of the pump body, the water swelling water stopping rubber strip is arranged in the groove, the middle opening face of the pump cover is fixed to the middle opening face of the pump body, and the middle opening face of the pump cover covers the groove. When leakage occurs at the middle open surface, the water-swelling water-stopping rubber strip is in contact with leaked water, the water-stopping rubber strip in contact with the water can rapidly swell, the volume of the water-stopping rubber strip in contact with the water is rapidly increased in a limited groove, the whole local area is filled with the water-stopping rubber strip, large pressure is generated, a leakage channel is blocked, and therefore the effects of blocking leakage and strengthening sealing are achieved. Compared with the mode that a sealing gasket is laid between a pump body and a pump cover, the water swelling water stopping rubber strip does not need to be machined and customized according to different water pumps.

Description

Technical Field

[0001] The utility model relates to the technical field of water pump sealing, in particular to a water pump with a novel sealing structure. Background Art

[0002] For the sealing method of the open face of the normal temperature clean water pump, flat gasket sealing method or rubber ring sealing method is usually adopted. Specifically, flat gasket sealing usually adopts laying sealing gaskets (such as green shell paper, rubber sheet, etc.) on the open face to improve the sealing performance of the open face. Rubber ring sealing is to open a groove on the open face and place a sealing ring or sealing strip in the groove to improve the sealing performance of the open face. It can be seen that the common practice of sealing the open face of the water pump is to improve the sealing performance of the open face by laying a sealing gasket between the pump body and the pump cover or laying a rubber ring in the groove of the open face.

[0003] However, the sealing gasket in the flat gasket sealing method needs to be customized according to different water pumps and is difficult to process. In the rubber ring sealing method, since the sealing ring or sealing strip is in a high pressure deformation state for a long time, the large stress will accelerate the aging of the rubber sealing element, thereby causing the sealing performance of the rubber sealing element to fail. Utility Model Content

[0004] (I) The problem to be solved by the utility model is that the sealing gasket in the flat gasket sealing method needs to be customized according to different water pumps and is difficult to process. In the rubber ring sealing method, since the sealing ring or sealing strip is in a high pressure deformation state for a long time, the large stress will accelerate the aging of the rubber sealing element, thereby causing the sealing performance of the rubber sealing element to fail.

[0005] (II) Technical solution

[0006] A water pump with a novel sealing structure comprises a pump body, a pump cover and a water-swelling water-stopping rubber strip;

[0007] The middle open surface of the pump body is provided with a groove, the water-swellable water-stop rubber strip is arranged in the groove, the middle open surface of the pump cover is fixed to the middle open surface of the pump body, and the middle open surface of the pump cover covers the groove.

[0008] According to an embodiment of the utility model, a plurality of first bolt holes are sequentially opened on the central open surface of the pump body, and the groove is located on the outer side of the first bolt holes.

[0009] According to an embodiment of the utility model, a plurality of first bolt holes are sequentially opened on the central open surface of the pump body, and the groove is located at the inner side of the first bolt holes.

[0010] According to an embodiment of the utility model, a plurality of second bolt holes corresponding to the first bolt holes are sequentially opened on the middle open surface of the pump cover;

[0011] When the pump cover is closed onto the pump body, the second bolt hole is coaxial with the corresponding first bolt hole.

[0012] According to an embodiment of the utility model, the width of the water-swellable waterproofing rubber strip is smaller than the width of the groove, and the height thereof is greater than the depth of the groove.

[0013] According to an embodiment of the utility model, the water expansion coefficient of the water-swellable waterproof rubber strip is 3-8.

[0014] According to an embodiment of the present utility model, the distance between the groove and the outer edge of the middle open surface of the pump body is 3mm-8mm.

[0015] According to an embodiment of the present invention, the cross-section of the groove is any one of semicircular, trapezoidal, and rectangular.

[0016] Beneficial effects of the utility model:

[0017] The utility model provides a water pump with a novel sealing structure, comprising a pump body, a pump cover and a water-swelling water-stopping rubber strip; a groove is provided on the middle open surface of the pump body, the water-swelling water-stopping rubber strip is arranged in the groove, the middle open surface of the pump cover is fixed to the middle open surface of the pump body, and the middle open surface of the pump cover covers the groove.

[0018] By opening a groove on the middle surface of the pump body, and then laying a water-swellable water-stop rubber strip in the groove, the water-swellable water-stop rubber strip has both the performance of general rubber products and the performance of self-expansion when exposed to water. In this way, when leakage occurs at the middle surface, the water-swellable water-stop rubber strip contacts the leaking water, and the water-stop rubber strip in contact with water will expand rapidly, and the volume in the limited groove will increase rapidly, filling the entire local area and generating a large pressure, blocking the leakage channel, thereby playing a role in blocking leakage and strengthening sealing. Moreover, compared with the method of laying a sealing gasket between the pump body and the pump cover, the water-swellable water-stop rubber strip does not need to be processed and customized according to different water pumps. Compared with the method of laying a rubber ring in the middle surface groove, the water-swellable water-stop rubber strip has the expansion performance. In the initial state, the height of the water-swellable water-stop rubber strip only needs to be slightly greater than the depth of the groove. Therefore, when installing and assembling the pump body and the pump cover, the interaction force between the middle surface of the pump cover and the water-swellable water-stop rubber strip is small, and the aging rate of the water-swellable water-stop rubber strip is significantly slowed down. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0020] Figure 1 A structural diagram provided for an embodiment of the utility model;

[0021] Figure 2 A top view of a pump body provided in an embodiment of the utility model;

[0022] Figure 3 A bottom view of the lift pump cover provided in an embodiment of the utility model.

[0023] Icons: 1. Pump body; 101. Open surface in the middle of pump body; 102. First bolt hole; 103. Groove; 2. Pump cover; 201. Open surface in the middle of pump cover; 202. Second bolt hole. DETAILED DESCRIPTION

[0024] The technical solution of the utility model will be clearly and completely described below in conjunction with the embodiments. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of 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.

[0025] like Figure 1-Figure 3 As shown, an embodiment of the utility model provides a water pump with a novel sealing structure, including a pump body 1, a pump cover 2 and a water-swellable water-stopping rubber strip;

[0026] A groove 103 is formed on the middle surface of the pump body 1 , and a water-swellable waterproof rubber strip is arranged in the groove 103 . The middle surface of the pump cover 2 is fixed to the middle surface of the pump body 1 , and the middle surface of the pump cover 2 covers the groove 103 .

[0027] In this embodiment, a groove 103 is formed on the middle open surface 101 of the pump body 1, and then a water-swelling water-stopping rubber strip is arranged in the groove 103. Since the water-swelling water-stopping rubber strip has the performance of general rubber products and the performance of self-swelling when exposed to water, when leakage occurs at the middle open surface, the water-swelling water-stopping rubber strip contacts the leaking water, and the water-stopping rubber strip in contact with water will expand rapidly, and the volume in the limited groove 103 will increase rapidly, filling the entire local area and generating a large pressure, blocking the leakage channel, thereby playing a role in blocking leakage and strengthening sealing. Moreover, compared with the method of laying a sealing gasket between the pump body 1 and the pump cover 2, the water-swelling water-stopping rubber strip does not need to be processed and customized according to different water pumps. Compared with the method of arranging a rubber ring by grooving the middle open surface, since the water-swellable waterstop rubber strip has expansion properties, in the initial state, the height of the water-swellable waterstop rubber strip only needs to be slightly greater than the depth of the groove 103. Therefore, when installing and assembling the pump body 1 and the pump cover 2, the interaction force between the middle open surface of the pump cover 2 and the water-swellable waterstop rubber strip is small, and the aging rate of the water-swellable waterstop rubber strip is significantly slowed down.

[0028] It is further necessary to explain that in the conventional method of laying the rubber ring in the groove of the middle open surface, after the rubber ring is laid on the groove 103 of the middle open surface of the pump body 1, the height of the rubber ring is greater than the depth of the groove 103, so that the middle open surface of the pump cover 2 applies a strong pressure to the rubber ring to ensure the sealing effect. However, since the rubber ring is in a state of deformation under pressure after being installed in the pump, the large stress will accelerate the aging of the rubber sealing element.

[0029] In the present application, since the water-swellable waterproof rubber strip has expansion performance, when there is no leakage, there is no need to maintain a large force between the water-swellable waterproof rubber strip and the middle open surface of the pump cover 2, that is, when the pump is installed, the height of the water-swellable waterproof rubber strip can be slightly less than the depth of the groove 103, or slightly greater than the depth of the groove 103, so that the waterproof rubber strip will not be in a state of deformation under pressure, and the aging process of the water-swellable waterproof rubber strip is slow. When leakage occurs, the water-swellable waterproof rubber strip contacts the leaking water, and the waterproof rubber strip in contact with the water will expand rapidly, and the volume in the limited groove 103 will increase rapidly, filling the entire local area and generating a large pressure. At this time, the water-swellable waterproof rubber strip applies pressure to the middle open surface of the pump cover 2.

[0030] As a preferred embodiment, Figure 2As shown, a plurality of first bolt holes 102 are sequentially opened on the pump body middle open surface 101 of the pump body 1, and a groove 103 is arranged along the outer edge of the pump body middle open surface 101, and the groove 103 is located outside the first bolt hole 102. A plurality of second bolt holes 202 corresponding to the first bolt holes 102 are sequentially opened on the pump cover middle open surface 201 of the pump cover 2, and when the pump cover 2 is covered on the pump body 1, the second bolt holes 202 are coaxial with the corresponding first bolt holes 102.

[0031] The pump body 1 and the pump cover 2 are fixed by bolts. Specifically, the inner wall of the second bolt hole 202 on the pump cover 2 is threadless, and the inner wall of the first bolt hole 102 on the pump body 1 is threaded. During installation, the bolts are inserted into the second bolt holes 202 on the pump cover 2 and matched with the threads in the first bolt holes 102 on the middle open surface 101 of the pump body, so that the pump body 1 and the pump cover 2 are fastened together, which is convenient for installing and removing the pump body 1 and the pump cover 2. A gasket is also installed between the bolt head of the bolt and the pump cover 2, and the gasket is sleeved on the bolt to play a buffering role.

[0032] It should be noted that since the pump body 1 and the pump cover 2 are fastened by bolts, the closer the position on the middle open surface is to the bolts, the better the sealing effect of the middle open surface. However, correspondingly, the closer the position is to the bolts, the greater the internal stress of the structure.

[0033] In the previous method of arranging rubber rings in the grooves of the middle open surface, the groove 103 is located on the inner side of the fastening bolt and is close to the fastening bolt. At this time, the O-shaped rubber ring is easily in contact with water. At the same time, the O-shaped rubber ring is in a strong deformation state under pressure after the pump is installed. The large stress will accelerate the aging of the rubber sealing element. The difference is that in this application, the groove 103 is set at the outer edge of the middle open surface 101 of the pump body. When the pump is installed, due to the structural size, the pressure exerted by the pump cover 2 on the water-swelling water-stopping rubber strip is relatively small, and the water-swelling water-stopping rubber strip will not accelerate aging due to the strong stress.

[0034] It should be noted that when laying out the water-swellable waterproof rubber strip, it is best to make the width of the water-swellable waterproof rubber strip slightly smaller than the width of the groove 103, and its height slightly larger than the depth of the groove 103. The purpose of making the height slightly larger than the depth of the groove 103 is that when assembling the pump, the pump cover 2 can apply a certain pressure to the water-swellable waterproof rubber strip to ensure that the water-swellable waterproof rubber strip has no greater pressure and deformation while achieving a sealing effect. The purpose of making the width of the water-swellable waterproof rubber strip slightly smaller than the width of the groove 103 is to give the water-swellable waterproof rubber strip a certain release space, which is also convenient for installing the water-swellable waterproof rubber strip.

[0035] Generally, the height of the cross section of the waterproof rubber strip is 1 mm-2 mm greater than the depth of the groove 103 , and the width of the cross section of the waterproof rubber strip is 1 mm-2 mm smaller than the width of the groove 103 .

[0036] Preferably, the water-swellable waterproof rubber strip is a waterproof rubber strip with a water expansion coefficient of 3 to 8. The expansion coefficient refers to the ratio of the volume of the waterproof rubber strip after it is fully immersed in water and expanded to the initial volume before it is exposed to water. A larger expansion coefficient is conducive to quickly plugging the leak. In this embodiment, a waterproof rubber strip with a water expansion coefficient of 3 can be selected.

[0037] It should be noted that in the conventional method of arranging the rubber ring by slotting the middle open surface, some water pumps have grooves 103 on both the pump body 1 and the pump cover 2, but this is not conducive to assembly. When assembling the pump, the pump body 1 and the pump cover 2 need to be aligned to ensure that the grooves 103 on the pump body 1 and the grooves on the pump cover 2 fit perfectly. In the present application, Figure 3 As shown, the groove 103 is not provided on the pump cover middle opening surface 201 of the pump cover 2, so when assembling the pump, there is no need to pay attention to the alignment of the groove 103 on the pump body 1 and the groove on the pump cover 2.

[0038] As a preferred embodiment, the cross-section of the groove 103 on the pump body 1 is semicircular, and the distance between the groove 103 and the outer periphery of the middle opening 101 of the pump body is 3 mm to 8 mm. It should be noted that the specific size of the groove 103 is determined according to the size of the middle opening of different water pumps to ensure that the size of the groove 103 will not affect the sealing performance.

[0039] Optionally, the cross section of the groove 103 may also be configured to be a rectangle or an isosceles trapezoid.

[0040] Since the water-swelling waterproof rubber strip in this embodiment has the property of swelling when it comes into contact with water, in the early stage of leakage caused by partial failure of the middle open face seal, when water leaks along the micro-channel of the middle open face, once the waterproof rubber strip contacts the leaking water, the waterproof rubber strip in contact with the water will rapidly swell, and the volume will rapidly increase in the limited groove 103 space, filling the entire local area and generating a large pressure, blocking the leakage channel, thereby playing the role of blocking the leakage and strengthening the seal. At the same time, since the waterproof rubber strip has expanded, when the cover is opened for maintenance and inspection, by observing the shape of the waterproof rubber strip, the direction of the micro-channel leakage can be preliminarily determined, which is convenient for subsequent improvement and treatment.

[0041] It should be noted that the sealing structure in this embodiment can be used as an auxiliary seal in conjunction with an O-ring or a sealing gasket to form a water pump center open face with a new type of sealing structure, which has a better effect.

[0042] When used in conjunction with an O-type rubber sealing ring, two grooves 103 are opened on the middle open surface 101 of the pump body 1. One groove 103 is located on the inner side of the first bolt hole 102 for installing the O-type rubber sealing ring, and the other groove 103 is located on the outer side of the first bolt hole 102 for arranging a water-swellable water-stop rubber strip.

[0043] In the description of the present invention, it should be noted that the terms "upper" and "lower" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0044] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be a connection between the insides of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances. In addition, in the description of the present invention, unless otherwise specified, "plurality" means two or more.

[0045] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A water pump with a new sealing structure, characterized in that: It comprises a pump body (1), a pump cover (2) and a water-swellable water-stopping rubber strip; A groove (103) is provided on the middle open surface of the pump body (1), the water-swellable waterproof rubber strip is arranged in the groove (103), the middle open surface of the pump cover (2) is fixed to the middle open surface of the pump body (1), and the middle open surface of the pump cover (2) covers the groove (103).

2. A water pump with a novel sealing structure according to claim 1, characterized in that: A plurality of first bolt holes (102) are sequentially formed on the central open surface of the pump body (1), and the groove (103) is located outside the first bolt holes (102).

3. A water pump with a novel sealing structure according to claim 1, characterized in that: A plurality of first bolt holes (102) are sequentially formed on the central open surface of the pump body (1), and the groove (103) is located inside the first bolt hole (102).

4. A water pump with a novel sealing structure according to claim 2 or 3, characterized in that: A plurality of second bolt holes (202) corresponding one to one with the first bolt holes (102) are sequentially formed on the middle open surface of the pump cover (2); When the pump cover (2) is covered on the pump body (1), the second bolt hole (202) and the corresponding first bolt hole (102) are coaxial.

5. A water pump with a novel sealing structure according to claim 1, characterized in that: The width of the water-swellable waterproof rubber strip is smaller than the width of the groove (103), and the height of the water-swellable waterproof rubber strip is greater than the depth of the groove (103).

6. A water pump with a novel sealing structure according to claim 1, characterized in that: The water-expanding water-stopping rubber strip has a water expansion coefficient of 3-8.

7. A water pump with a novel sealing structure according to claim 2, characterized in that: The distance between the groove (103) and the outer edge of the middle open surface of the pump body (1) is 3 mm to 8 mm.

8. A water pump with a novel sealing structure according to claim 1, characterized in that: The cross section of the groove (103) is any one of a semicircular, a trapezoidal, and a rectangular shape.

Images