Lip-shaped pad for quick-opening blind plate

Abstract

The utility model discloses a lip-shaped pad for a quick-opening blind plate, which belongs to the technical field of quick-opening blind plate sealing, is matched with the quick-opening blind plate for use, and comprises a lip-shaped pad body, a sealing lip, a pressure equalizing hole and a second pressure groove. By arranging the second pressure groove, expansion is generated under the pressurizing effect, the lip-shaped pad body is pressurized towards the two sides to form attached sealing with the sealing groove, sealing of the quick-opening blind plate is formed, and the problem that an existing quick-opening blind plate can only achieve the sealing effect under the condition of high-precision matching, and the sealing effect is poor is solved. The quick-opening blind plate can be suitable for being used in very complex environments with impurities, dust and the like, and the sealing performance of the pipeline in the complex environments is improved.

Description

Technical Field

[0001] The utility model patent relates to the technical field of quick-opening blind plate sealing, in particular to a lip-shaped pad for a quick-opening blind plate. Background Art

[0002] The sealing gasket for quick-opening blind plate is used to seal the pipe opening and improve the sealing performance of the pipe. It has the same function as the head and pipe cap, except that the quick-opening blind plate sealing gasket is a detachable sealing device, while the seal of the head is not intended to be opened again. There are many types of sealing surfaces of a quick-opening blind plate sealing structure suitable for positive pressure, including flat surface, convex surface, concave-convex surface, tongue-and-groove surface and ring connection surface.

[0003] When the quick-opening blind plate is in the closed state, the sealing ring is used to achieve the sealing between the blind plate seat and the blind plate cover. For medium and low pressure media, the sealing ring can achieve a good sealing effect and avoid leakage of the medium. However, for high pressure media, the pressure of the medium can easily squeeze the sealing ring out of its installation groove, thereby affecting the sealing effect.

[0004] When the quick-opening blind plate is sealed with a sealing gasket, this sealing structure requires the seal to be deeply inserted into the groove of the lip seal, and high-precision matching is required to achieve the sealing effect. However, the quick-opening blind plate is used in a very complex environment with a lot of impurities and dust. Impurities or dust can easily enter the lip seal, which can easily affect the high-precision matching and result in low sealing performance. Utility Model Content

[0005] The utility model discloses a lip-shaped pad for a quick-opening blind plate. The device realizes sealing with the upper cover of the blind plate under pressurized conditions by providing a sealing lip with a triangular cross-section, and realizes sealing with the blind plate base under pressurized conditions by providing a pressure equalizing hole and a second pressure groove. The sealing of the quick-opening blind plate is realized through the structural improvement of the lip-shaped pad, which solves the limitation that high-precision matching is required when the quick-opening blind plate is used, and improves the sealing performance and practicality of the quick-opening blind plate in very complex environments such as dust.

[0006] The utility model discloses a lip-shaped pad for a quick-opening blind plate, which is used in conjunction with the quick-opening blind plate. The quick-opening blind plate comprises: a blind plate base and a blind plate cover, the blind plate base is provided with an annular groove, the annular groove is provided with a lip-shaped pad for sealing, and is characterized in that the lip-shaped pad comprises: a lip-shaped pad body, a sealing lip, a pressure equalizing hole and a second pressure groove, the outer contour shape of the lip-shaped pad body corresponds to the inner contour shape of the annular groove, the bottom of the lip-shaped pad body is provided with a second pressure groove, the second pressure groove is provided with a pressure equalizing hole above the second pressure groove, the pressure equalizing hole is communicated with the second pressure groove, a sealing lip is provided at the top end of the lip-shaped pad body side, and the inclination angle of the sealing lip corresponds to the inclination angle of the edge of the blind plate cover.

[0007] Preferably, the included angle between the sealing lip and the lip pad body is 50°-70°, and an arc transition is adopted at the included angle to improve the mechanical performance.

[0008] Preferably, the pressure equalizing holes have an angle of 15° with the vertical direction and are arranged at intervals, the tops of the pressure equalizing holes are communicated with the outside, and the bottoms of the pressure equalizing holes are communicated with the second pressure groove.

[0009] Preferably, the second pressure groove is a cavity structure, and the second pressure groove expands after being inflated, so that the side surface of the lip-shaped pad body fits with the annular groove to achieve pressure sealing.

[0010] Preferably, the lip pad body is made of elastic material.

[0011] Preferably, clamping grooves are provided on both sides below the annular groove, and protrusions corresponding to the clamping grooves are provided below the lip-shaped pad body.

[0012] Beneficial Effects

[0013] The utility model improves the sealing belt of the quick-opening blind plate and proposes a lip-shaped gasket for the quick-opening blind plate. The sealing lip with a triangular cross-section is provided to achieve sealing with the upper cover of the blind plate under pressure. The angle between the sealing lip and the lip-shaped gasket body is transitioned by an arc, which increases the mechanical properties of the lip-shaped gasket, improves the service life of the lip-shaped gasket, and improves the overall high-pressure resistance of the quick-opening blind plate.

[0014] The utility model realizes sealing with the blind plate base under pressurized condition by providing a pressure equalizing hole and a second pressure groove, realizes efficient sealing of the quick-opening blind plate through the structural improvement of the lip-shaped pad, does not require high-precision matching of the blind plate upper cover and the blind plate base, can be used in very complex environments with a lot of impurities, dust, etc. and maintain efficient sealing, thereby improving the practicality of the quick-opening blind plate in complex environments. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings in the following description are only embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0016] Figure 1 It is a schematic diagram of the structure of the lip pad for quick opening blind plate;

[0017] Figure 2 This is a schematic diagram of the use of lip pads for quick-opening blind plates;

[0018] Figure 3 A three-dimensional diagram of a lip pad for a quick-opening blind plate;

[0019] Figure 4 It is a structural schematic diagram of a lip-shaped pad for a quick-opening blind plate;

[0020] In the figure: 1, blind plate base, 2, blind plate upper cover, 3, lip-shaped pad body, 4, sealing lip, 5, pressure equalizing hole, 6, second pressure groove, 7, protrusion, 8 annular groove. DETAILED DESCRIPTION

[0021] A lip-shaped pad for a quick-opening blind plate is used in conjunction with the quick-opening blind plate. The quick-opening blind plate comprises: a blind plate base 1 and a blind plate upper cover 2. The blind plate base 1 is provided with an annular groove 8, and the annular groove 8 is provided with a lip-shaped pad for sealing. The characteristic is that the lip-shaped pad comprises: a lip-shaped pad body 3, a sealing lip 4, a pressure equalizing hole 5 and a second pressure groove 6. The outer contour of the lip-shaped pad body 3 corresponds to the outer contour of the annular groove 8. The second pressure groove 6 is below the lip-shaped pad body 3, and a pressure equalizing hole 5 is provided above the second pressure groove 6. The pressure equalizing hole 5 is connected with the second pressure groove 6 so that the second pressure groove 6 maintains the same air pressure as the outer side of the lip-shaped pad body 3. A sealing lip 4 is provided on the top end of the lip-shaped pad body 3. The sealing lip 4 is inclined to the right side. The inclination angle of the sealing lip 4 corresponds to the inclination angle of the edge of the blind plate upper cover 2. When pressure is applied from the outside, the upper side of the sealing lip 4 is tightly attached to the blind plate upper cover 2 for sealing.

[0022] In some embodiments, the angle between the sealing lip 4 and the lip pad body 3 is 50°-70°.

[0023] °, and an arc transition is adopted at the angle to increase the mechanical properties of the sealing lip 4 and improve the service life of the lip pad.

[0024] In some embodiments, the pressure equalizing hole 5 has an angle of 15° with the vertical direction and the pressure equalizing holes 5 are arranged at intervals. The pressure equalizing hole 5 is connected to the outside world above and is connected to the second pressure groove 6 below. The pressure equalizing hole 5 is responsible for transferring the air pressure outside the lip-shaped pad to the second pressure groove 6. By setting the inclination angle, the air pressure generated on the side wall of the second pressure groove 6 when the external air pressure enters the second pressure groove 6 is slowed down, thereby improving the service life of the lip-shaped pad.

[0025] In some embodiments, the second pressure groove 6 is a cavity structure, and the second pressure groove 6 expands after being inflated, so that the side surface of the lip-shaped pad body 3 is pressed and fitted with the annular groove 8 to achieve pressure sealing.

[0026] In some embodiments, the lip pad body 3 is made of elastic material so that the lip pad body 3 can be deformed when subjected to external pressure, thereby forming an extrusion seal with the side wall of the annular groove 8 .

[0027] Example 1

[0028] In a specific implementation manner provided by the present utility model, as Figure 1-Figure 3As shown, the inclination angle of the blind plate upper cover 2 of the quick-opening blind plate is measured, the width of the annular groove 8 of the blind plate base 1 is measured, and a lip-shaped pad corresponding to the inclination angle and the width of the annular groove 8 is selected, and the lip-shaped pad body 3 is placed in the annular groove 8, and the blind plate upper cover 2 is closed. The sealing lip 4 corresponds to the blind plate upper cover 2, and the inner side of the quick-opening blind plate is pressurized. The sealing lip 4 fits with the blind plate upper cover 2 after being pressurized, and the internal air pressure is introduced into the second pressure groove 6 through the pressure equalizing hole 5. The second pressure groove 6 is squeezed and expanded and deformed by the air pressure, and the deformed side wall of the lip-shaped pad body 3 squeezes the side wall of the annular groove 8 to form a seal for the blind plate base 1. The utility model seals the blind plate upper cover 2 and the blind plate base 1 through the lip-shaped pad, which reduces the requirement for high-precision matching of the blind plate upper cover 2 and the blind plate base 1.

[0029] Example 2

[0030] In a specific implementation manner provided by the present utility model, as Figure 4 As shown, the blind plate base 1 can be provided with card grooves on both sides below the annular groove 8, and a protrusion 7 corresponding to the card groove is provided below the lip-shaped pad body 3. The lip-shaped pad and the blind plate base 1 are fitted and fixed by combining the card groove and the protrusion 7. When the blind plate upper cover 2 is closed and pressurized, the internal air pressure is introduced into the second pressure groove 6 through the pressure equalizing hole 5. The second pressure groove 6 is squeezed and deformed by the air pressure. The deformed side wall of the lip-shaped pad body 3 squeezes the side wall of the annular groove 8 and seals the blind plate base 1 together with the protrusion 7, thereby achieving a better sealing effect.

[0031] Example 3

[0032] In a specific implementation manner provided by the present utility model, as Figure 1-Figure 4 As shown, the materials of the lip pad of the utility model include: polytetrafluoroethylene, fluorosilicone rubber, polyurethane rubber, hydrogenated nitrile rubber, etc.

Claims

1. A lip-shaped pad for a quick-opening blind plate, used in conjunction with the quick-opening blind plate, the quick-opening blind plate comprises: A blind plate base and a blind plate cover, the blind plate base is provided with an annular groove, the annular groove is provided with a lip-shaped pad for sealing, characterized in that the lip-shaped pad comprises: a lip-shaped pad body, a sealing lip, a pressure equalizing hole and a second pressure groove, the outer contour shape of the lip-shaped pad body corresponds to the inner contour shape of the annular groove, a second pressure groove is provided at the bottom of the lip-shaped pad body, a pressure equalizing hole is provided above the second pressure groove, the pressure equalizing hole is connected with the second pressure groove, a sealing lip is provided at the top end of the lip-shaped pad body, and the inclination angle of the sealing lip corresponds to the inclination angle of the edge of the blind plate cover.

2. A lip pad for a quick-opening blind plate according to claim 1, characterized in that: The cross section of the sealing lip is triangular, and the angle between the sealing lip and the lip pad body is 50°-70°, and an arc transition is adopted at the angle to improve the mechanical performance.

3. A lip pad for a quick-opening blind plate according to claim 1, characterized in that: The pressure equalizing holes have an angle of 15° with the vertical direction and are arranged at intervals. The top of the pressure equalizing holes is communicated with the outside, and the bottom of the pressure equalizing holes is communicated with the second pressure groove.

4. A lip pad for a quick-opening blind plate according to claim 1, characterized in that: The second pressure groove is a cavity structure. After being inflated, the second pressure groove expands, so that the side surface of the lip-shaped pad body fits with the annular groove to achieve pressure sealing.

5. The lip pad for a quick-opening blind plate according to claim 1, characterized in that: The lip pad body is made of elastic material.

6. A lip pad for a quick-opening blind plate according to claim 1, characterized in that: Clamping grooves are arranged on both sides below the annular groove, and convex blocks corresponding to the clamping grooves are arranged below the lip-shaped pad body.

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