Positive and negative pressure sealing valve

Abstract

The utility model discloses a positive and negative pressure seal valve, relates to the seal valve technical field, including valve body mechanism, the inner wall of valve body mechanism is provided with valve core mechanism, the valve core mechanism includes connecting block, the inside of connecting block is fixedly connected with guide sleeve, the inside of guide sleeve is inserted with push rod, the push rod is inserted with push rod. The upper end of the ejector rod is fixedly connected with a first pressing plate, and the bottom of the first pressing plate is fixedly connected with a first spring. Through the arrangement of the valve element mechanism, the rubber sleeve is tightly abutted against the inner wall of the connecting piece by utilizing the pulling force of the second spring on the pressing block, the valve body is primarily sealed from the inside, and then the pressing plate drives the fourth rubber ring to tightly abut against the bottom of the connecting block under the action that the first spring pulls the ejector rod, so that the sealing is performed again; the sealing valve has double sealing during use, leakage of internal objects caused by aging of the single-layer rubber ring is avoided, and the sealing effect of the sealing valve is better.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of sealing valve, specifically relates to positive and negative pressure sealing valve. BACKGROUND

[0002] As an indispensable key component in the industrial field, sealing valves are widely used in many industries such as petroleum and chemical industry, natural gas transportation, pharmaceutical industry, food processing, etc. In the petroleum and chemical industry, pipeline systems transport various high-temperature, high-pressure and highly corrosive liquids and gases, and have the functions of precise control of fluid on-off and strict prevention of leakage. Once the sealing fails, not only will it cause material waste and environmental pollution, but also may even cause serious safety accidents. In the fields of food processing and pharmaceutical industry, the hygiene standards are extremely high, and the sealing valve needs to ensure that the sterile environment is not damaged and prevent impurities from mixing into the product. However, with the rapid development of various industries, higher requirements are put forward for the sealing performance, durability, adjustment accuracy and ability to adapt to complex working conditions of the sealing valve, prompting its continuous innovation and upgrading.

[0003] For example, the Chinese patent with the announcement number CN221075368U discloses a metal barrel air pumping leak-proof one-way valve, which comprises a valve body, the valve body is a metal integrated casting, the valve body is sequentially divided into a lower connecting section, an intermediate section and an upper connecting section from bottom to top, a stepped through hole is formed in the valve body, a threaded groove is formed in the inner ring surface of the lower part of the stepped through hole, external threads are formed on the outer walls of the lower connecting section and the upper connecting section, and a valve core is screwed in the stepped through hole. The utility model relates to the technical field of metal packaging barrel one-way valve, adopts a double sealing structure of intermediate one-way sealing and external cap sealing, the one-way valve has large bearing pressure, good sealing performance, novel structure, good safety performance, can guarantee the sealing performance of the product, and realizes the functions of vacuum pumping, gas injection and automatic sealing.

[0004] Although the above example can provide the valve body with a double sealing mechanism through the setting of the plugging cap, the plugging cap needs to be removed when the valve body is used, so that the valve body only has one layer of sealing. During the long-term use of the valve body, the sealing gasket in the valve body may leak due to aging, so that the valve body leaks due to poor sealing effect after the plugging cap is removed, which is not convenient to use. SUMMARY

[0005] The utility model provides positive and negative pressure sealing valve to solve the problem in above -mentioned background art.

[0006] To solve the above technical problems, the utility model adopts the technical scheme of:

[0007] The positive and negative pressure sealing valve comprises a valve body mechanism, the inner wall of the valve body mechanism is provided with a valve core mechanism, the valve core mechanism comprises a connecting block, the inside of the connecting block is fixedly connected with a guide sleeve, the inside of the guide sleeve is inserted with a top rod, the upper end of the top rod is fixedly connected with a first pressing plate, and the bottom of the first pressing plate is fixedly connected with a first spring.

[0008] The further improvement of the technical scheme of the utility model lies in that the lower end of the first spring is fixedly connected with the surface of the connecting block, and the lower end of the top rod is fixedly connected with a second pressing plate.

[0009] The further improvement of the technical scheme of the utility model lies in that the top of the second pressing plate is fixedly connected with a fourth rubber ring, and the top of the fourth rubber ring is overlapped with the bottom of the connecting block.

[0010] The further improvement of the technical scheme of the utility model lies in that the bottom of the second pressing plate is fixedly connected with a second spring, the lower end of the second spring is fixedly connected with a pressing block, the surface of the pressing block is fixedly connected with a rubber sleeve, and the surface of the connecting block is sleeved with a fifth rubber ring.

[0011] The further improvement of the technical scheme of the utility model lies in that the valve body mechanism comprises a connecting piece, the surface of the connecting piece is provided with a first rubber ring, and the top of the connecting piece is screw-connected with a sealing cover.

[0012] The further improvement of the technical scheme of the utility model lies in that the inner wall of the sealing cover inner cavity is fixedly connected with a second rubber ring, and the bottom of the second rubber ring is fixedly connected with the surface of the connecting piece.

[0013] The further improvement of the technical scheme of the utility model lies in that the top of the sealing cover inner cavity is provided with a third rubber ring, and the bottom of the third rubber ring is overlapped with the top of the connecting piece.

[0014] The further improvement of the technical scheme of the utility model lies in that the inner wall of the connecting piece is screw-connected with the surface of the connecting block, the lower end of the connecting piece inner wall is overlapped with the surface of the rubber sleeve, and the inner wall of the connecting piece is overlapped with the surface of the fifth rubber ring.

[0015] Due to the adoption of the above technical scheme, the utility model has the following technical progress compared with the prior art:

[0016] The utility model provides a positive and negative pressure sealing valve, through the setting of valve core mechanism, utilize the tension of second spring to the pressure block, make rubber bushing and the inner wall of connecting piece tight resistance, carry out first sealing to valve body from inside, subsequently under the action of first spring pull top rod, make the pressing plate drive fourth rubber ring and connecting block bottom tight resistance, carry out sealing again, make the sealing valve have two -layer sealing when using, avoid single -layer rubber ring aging and lead to internal object leak, make its sealing effect better, the setting of sealing cover still can press second rubber ring and third rubber ring and connecting piece tight resistance, carry out enhancement to the sealing effect of sealing valve again, make its sealing effect improve again when at rest, it is more convenient to use. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 It is the front view structure schematic drawing of the utility model;

[0018] Figure 2 It is the exploded view schematic drawing of the utility model;

[0019] Figure 3 It is the valve core mechanism structure schematic drawing of the utility model;

[0020] Figure 4 It is the cross section structure schematic drawing of the utility model.

[0021] In the drawing: 11, connecting piece; 12, first rubber ring; 13, sealing cover; 14, second rubber ring; 15, third rubber ring; 21, connecting block; 22, guide sleeve; 23, top rod; 24, first pressing plate; 25, first spring; 26, second pressing plate; 27, fourth rubber ring; 28, second spring; 29, pressure block; 210, rubber bushing; 211, fifth rubber ring. DETAILED DESCRIPTION

[0022] The utility model will be further explained in detail in connection with the embodiment: EMBODIMENT

[0023] As Figures 1-4 The utility model provides a positive and negative pressure sealing valve, including valve body mechanism, the inner wall of valve body mechanism is provided with valve core mechanism, and the valve core mechanism includes connecting block 21, and the inside fixed connection of connecting block 21 has guide sleeve 22, and the inside of guide sleeve 22 is inserted with top rod 23, and the upper end fixed connection of top rod 23 has first pressing plate 24, and the bottom fixed connection of first pressing plate 24 has first spring 25.

[0024] In this embodiment, by pressing the first pressure plate 24 downward, the top rod 23 slides downward along the guide sleeve 22, pushing the second pressure plate 26 downward, causing the fourth rubber ring 27 to disengage from the connecting block 21. At the same time, the downward movement of the second pressure plate 26 can also push the second spring 28 downward until it loses tension, pushing the pressure block 29 downward, causing the rubber sleeve 210 to disengage from the inner wall of the connecting piece 11, thus connecting the inside and outside of the valve body. Example

[0025] like Figures 1-4 As shown, based on Embodiment 1, this utility model provides a technical solution: Preferably, the lower end of the first spring 25 is fixedly connected to the surface of the connecting block 21, the lower end of the top rod 23 is fixedly connected to the second pressure plate 26, the top of the second pressure plate 26 is fixedly connected to the fourth rubber ring 27, the top of the fourth rubber ring 27 overlaps with the bottom of the connecting block 21, the bottom of the second pressure plate 26 is fixedly connected to the second spring 28, the lower end of the second spring 28 is fixedly connected to the pressure block 29, the surface of the pressure block 29 is fixedly connected to the rubber sleeve 210, and the surface of the connecting block 21 is fitted with the fifth rubber ring 211.

[0026] In this embodiment, by loosening the first pressure plate 24, the push rod 23 moves the second pressure plate 26 upward under the action of the first spring 25, causing the second spring 28 to move the rubber sleeve 210 to press tightly against the inner wall of the connector 11 for initial sealing. Subsequently, the push rod 23 pulls the second pressure plate 26 to press the fourth rubber ring 27 against the bottom of the connector 21 for secondary sealing, thereby improving the sealing effect of the sealing valve. Example

[0027] like Figures 1-4 As shown, based on Embodiment 1, this utility model provides a technical solution: Preferably, the valve body mechanism includes a connector 11, a first rubber ring 12 is provided on the surface of the connector 11, a sealing cap 13 is threadedly connected to the top of the connector 11, a second rubber ring 14 is fixedly connected to the inner wall of the inner cavity of the sealing cap 13, the bottom of the second rubber ring 14 is fixedly connected to the surface of the connector 11, a third rubber ring 15 is provided at the top of the inner cavity of the sealing cap 13, the bottom of the third rubber ring 15 overlaps with the top of the connector 11, the inner wall of the connector 11 is threadedly connected to the surface of the connecting block 21, the lower end of the inner wall of the connector 11 overlaps with the surface of the rubber sleeve 210, and the inner wall of the connector 11 overlaps with the surface of the fifth rubber ring 211.

[0028] In the embodiment, the connecting piece 11 is connected with the container to be installed through the thread arranged on the surface in use, the connecting piece 11 extrudes the first rubber ring 12 to contact the surface of the container in connection, the sealing effect is better in installation, the sealing cover 13 is connected with the top of the connecting piece 11 through the thread, the second rubber ring 14 and the third rubber ring 15 are tightly abutted with the surface of the connecting piece 11, the sealing efficiency of the sealing valve is further improved, and the sealing valve is more convenient to use.

[0029] The working principle of the positive and negative pressure sealing valve will be described in detail below.

[0030] As shown in the figure, the connecting piece 11 is connected with the container to be installed through the thread arranged on the surface in use, the connecting piece 11 extrudes the first rubber ring 12 to contact the surface of the container in connection, the sealing effect is better in installation, the sealing cover 13 is connected with the top of the connecting piece 11 through the thread, the second rubber ring 14 and the third rubber ring 15 are tightly abutted with the surface of the connecting piece 11, the sealing efficiency of the sealing valve is further improved, and the sealing valve is more convenient to use. Figures 1-4 As shown in the figure, the connecting piece 11 is connected with the container to be installed through the thread arranged on the surface in use, the connecting piece 11 extrudes the first rubber ring 12 to contact the surface of the container in connection, the sealing effect is better in installation, the sealing cover 13 is connected with the top of the connecting piece 11 through the thread, the second rubber ring 14 and the third rubber ring 15 are tightly abutted with the surface of the connecting piece 11, the sealing efficiency of the sealing valve is further improved, and the sealing valve is more convenient to use.

[0031] The above has made a detailed description of the utility model, but some modifications or improvements can be made on the basis of the utility model, which is obvious to those skilled in the art. Therefore, the modifications or improvements without departing from the spirit of the utility model are within the protection scope of the utility model.

Claims

1. A positive and negative pressure seal valve comprising a valve body mechanism, characterized by: The inner wall of the valve body mechanism is provided with a valve core mechanism, the valve core mechanism comprises a connecting block (21), the inside of the connecting block (21) is fixedly connected with a guide sleeve (22), the inside of the guide sleeve (22) is inserted with a top rod (23), the upper end of the top rod (23) is fixedly connected with a first pressing plate (24), the bottom of the first pressing plate (24) is fixedly connected with a first spring (25).

2. The positive and negative pressure seal valve of claim 1, wherein: The lower end of the first spring (25) is fixedly connected with the surface of the connecting block (21), and the lower end of the top rod (23) is fixedly connected with a second pressing plate (26).

3. The positive and negative pressure seal valve of claim 2, wherein: The top of the second pressing plate (26) is fixedly connected with a fourth rubber ring (27), and the top of the fourth rubber ring (27) is overlapped with the bottom of the connecting block (21).

4. The positive and negative pressure seal valve of claim 3, wherein: The bottom of the second pressing plate (26) is fixedly connected with a second spring (28), the lower end of the second spring (28) is fixedly connected with a pressing block (29), the surface of the pressing block (29) is fixedly connected with a rubber sleeve (210), and the surface of the connecting block (21) is sleeved with a fifth rubber ring (211).

5. The positive and negative pressure seal valve of claim 1, wherein: The valve body mechanism comprises a connecting piece (11), the surface of the connecting piece (11) is provided with a first rubber ring (12), and the top of the connecting piece (11) is threadedly connected with a sealing cover (13).

6. The positive and negative pressure seal valve of claim 5, wherein: The inner wall of the sealing cover (13) is fixedly connected with a second rubber ring (14), and the bottom of the second rubber ring (14) is fixedly connected with the surface of the connecting piece (11).

7. The positive and negative pressure seal valve of claim 6, wherein: The top of the sealing cover (13) is provided with a third rubber ring (15), and the bottom of the third rubber ring (15) is overlapped with the top of the connecting piece (11).

8. The positive and negative pressure seal valve of claim 7, wherein: The inner wall of the connecting piece (11) is threadedly connected with the surface of the connecting block (21), the lower end of the inner wall of the connecting piece (11) is overlapped with the surface of the rubber sleeve (210), and the inner wall of the connecting piece (11) is overlapped with the surface of the fifth rubber ring (211).

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