Sealing rubber strip for screen cloth of vibrating screen

Abstract

The utility model relates to the technical field of sealing, in particular to a sealing rubber strip for a screen mesh of a vibrating screen. Comprising a straight part and a vertical part, a rubber strip is installed between the vertical part of the connecting strip and the side wall, on one side of the connecting strip, of the screen box, a plug strip is fixed to the upper end of the rubber strip, and the plug strip and the rubber strip are integrally formed. The plug strip comprises a vertical part and an inclined part at the upper end of the vertical part, the vertical part and the inclined part of the plug strip are integrally formed, the end, away from the vertical part of the plug strip, of the inclined part of the plug strip inclines downwards, the screen frame is located between the plug strip and the rubber strip, the vertical part of the plug strip is located between the screen frame and the screen box, and the screen frame and the screen box tightly abut against the vertical part of the plug strip. The screen frame is in sealing contact with the plug strip and the rubber strip, and a screen is fixed in the screen frame. According to the utility model, the plug strip is arranged, so that one side, close to the drying box, of the screen frame can be covered by the plug strip, and abrasion caused by relative movement of the screen mesh and the screen frame can be avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of sealing, and particularly relates to a sealing rubber strip for a vibrating screen mesh. Background Art

[0002] At present, during the process of oil drilling operations, the separation of the solid phase (drill cuttings) of the drilling fluid plays an important role in improving the drilling speed, reducing the wear of the equipment in the rig circulation system, and reducing the drilling cost. Currently, the primary separation of the solid phase of the drilling fluid is completed by a vibrating screen. At present, the screen of the drilling fluid vibrating screen is fixed on the screen box slats by pull plates, and there is an easy occurrence of a large gap between the screen and the screen box slats, enabling oily sludge to fall below the screen through the gap, thereby affecting the screening effect.

[0003] The patent document with the application number CN201521128532.X discloses a sealing structure for a mud vibrating screen mesh. This sealing structure is installed between the vibrating screen mesh support frame and the mesh on the inner side of the vibrating screen box, and includes a U-shaped groove body and a rectangular cross-section rubber sealing strip. A connection hole fixedly connected to the vibrating screen mesh support frame is provided along the length direction of the bottom of the U-shaped groove body. The rectangular cross-section sealing rubber strip is embedded in the U-shaped groove body and protrudes above the upper end surface of the U-shaped groove body. In the technical solution of this patent document, the screen contacts the screen box, and the sealing contact between the screen and the vibrating screen mesh support frame is realized by the rubber sealing strip contacting the lower end of the screen and the upper end of the vibrating screen mesh support frame. However, during the working process, when the connection between the screen and the screen box becomes loose, the screen is prone to relative sliding with the screen box, easily leading to wear of the screen and the screen box.

[0004] The patent document with the application number CN201922419872.2 discloses a sealing structure for the installation of a vibrating screen mesh. The screen of the vibrating screen is arranged on the support frame of the vibrating screen, and the support is usually fixedly installed on the screen box of the vibrating screen. The sealing structure described in this embodiment includes a support component and a sealing component arranged between the support frame and the screen; wherein, the support component includes four support beams fixedly arranged on the support frame, and the support beams form a frame structure matching the shape of the screen; the sealing component includes sealing members respectively arranged on the support beams. The screen is arranged on the sealing members of the support beams, and the screen is fixedly installed through a wedge-shaped member to achieve the sealing installation of the screen on the vibrating screen. In this technical solution, a side sealing strip is arranged between the screen and the screen box. When the screen and the screen box move relative to each other, the side sealing strip can prevent the screen and the screen box from wearing. However, the side sealing strip cannot fill the gap between the screen and the screen box. When drill cuttings enter the gap between the screen box and the screen, wear is still likely to occur when the screen and the screen box move relative to each other. Summary of the Utility Model

[0005] The technical problem to be solved by the present utility model is a vibrating screen screen sealing rubber strip that can effectively prevent wear between the screen box and the screen mesh and has a good shock-absorbing effect on the screen mesh.

[0006] In order to achieve the above object, the technical solution provided by the present utility model is:

[0007] A vibrating screen screen sealing rubber strip includes a supporting strip fixed to the inner wall of the screen box. A connecting strip with an inverted L-shaped cross-section is detachably and fixedly connected to the upper end of the supporting strip. The connecting strip includes a straight part and a vertical part. A rubber strip is installed between the vertical part of the connecting strip and the side wall of the screen box on one side thereof. The rubber strip is in sealing contact with the inner wall of the screen box on one side thereof. A plug strip is fixed to the upper end of the rubber strip. The plug strip is integrally formed with the rubber strip. The plug strip includes a vertical part and an inclined part at the upper end of the vertical part. The vertical part and the inclined part of the plug strip are integrally formed. The inclined part of the plug strip slopes downward at the end far from the vertical part of the plug strip. The vertical part of the plug strip is in sealing contact with the inner wall of the screen box on one side thereof. The screen frame is located between the plug strip and the rubber strip. The vertical part of the plug strip is located between the screen frame and the screen box. The screen frame and the screen box tightly abut against the vertical part of the plug strip. The screen frame is in sealing contact with the plug strip and the rubber strip. A screen mesh is fixed inside the screen frame.

[0008] Specifically, the plug strip is made of rubber.

[0009] Specifically, a plurality of elastic pieces are fixed inside the plug strip. The elastic pieces include a vertical part and an inclined part at the upper end of the vertical part. The vertical part and the inclined part of the elastic piece are integrally formed. The vertical part of the elastic piece is located inside the vertical part of the plug strip. The inclined part of the elastic piece is located inside the inclined part of the plug strip.

[0010] Specifically, a sliding strip is fixed to the side of the vertical part of the connecting strip facing the rubber strip. The cross-section of the sliding strip is an inverted trapezoid. A trapezoidal groove is formed on the rubber strip. The sliding strip is slidably clamped in the trapezoidal groove.

[0011] Specifically, a plurality of stepped holes are formed on the straight part of the connecting strip. A lower hole concentric with the stepped holes is formed at the lower end of the rubber strip. A sleeve is fixed inside the lower hole. A plurality of support rods are circumferentially and uniformly fixed to the outer edge of the sleeve. The support rods extend into the rubber strip. A countersunk head screw passes through the stepped hole and is threadedly connected to the sleeve.

[0012] Specifically, a plurality of bolts are penetratingly arranged on the supporting strip. The bolts are threadedly connected to the connecting strip.

[0013] Specifically, a plurality of blocking members are arranged inside the screen box above the screen frame. The upper end of the blocking member is fixedly connected to the screen box. The lower end of the blocking member tightly abuts against the upper end of the screen frame.

[0014] Compared with the prior art, the beneficial effects of the present utility model are:

[0015] 1. By providing the plug strip, the present utility model can enclose the side of the screen frame close to the screen box, and can avoid wear caused by relative movement between the screen mesh and the screen frame.

[0016] 2. The plug strip can prevent well fluid from entering the gap between the screen frame and the screen box, and can avoid abrasion when the screen mesh and the screen frame move relative to each other.

[0017] 3. An inner sleeve is fixed inside the rubber strip. Multiple support rods are fixed on the outer edge of the inner sleeve and extend into the rubber strip. The connection strength between the inner sleeve and the rubber strip is high, which can improve the connection strength between the rubber strip and the connecting strip.

[0018] 4. The elastic piece can make the inclined part of the plug strip closely adhere to the upper end of the screen frame. After the screen frame and the screen box tightly abut against the vertical part of the plug strip, the vertical part of the elastic piece is clamped by the screen frame and the screen box. Under the elastic force of the elastic piece, after the screen frame is located between the inclined part of the plug strip and the rubber strip, the inclined part of the elastic piece can force the inclined part of the plug strip to tightly abut against the upper end of the screen frame, which can improve the sealing performance between the screen frame and the plug strip and improve the sealing time limit for the screen frame. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic cross-sectional structure diagram of the present utility model.

[0020] Figure 2 It is a schematic diagram of the rubber strip.

[0021] Figure 3 It is a schematic diagram of the inner sleeve in the rubber strip.

[0022] Figure 4 It is a schematic diagram of the connecting strip.

[0023] The names of the components in the drawings are:

[0024] 1. Screen box

[0025] 2. Support strip

[0026] 3. Connecting strip

[0027] 4. Bolt

[0028] 5. Rubber strip

[0029] 6. Plug strip

[0030] 7. Elastic piece

[0031] 8. Screen frame

[0032] 9. Screen mesh

[0033] 10. Inner sleeve

[0034] 11. Support rod

[0035] 12. Slide strip

[0036] 13. Trapezoidal groove

[0037] 14. Step hole

[0038] 15 Stopper. DETAILED DESCRIPTION

[0039] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0040] Example 1: Reference Figures 1-4 As shown, a vibrating screen mesh sealing strip includes a support strip 2 fixed to the inner wall of a screen box 1, and a connecting strip 3 with an inverted L-shaped cross section is detachably fixedly connected to the upper end of the support strip 2. Specifically, a plurality of bolts 4 are provided through the support strip 2, and the bolts 4 are threadedly connected to the connecting strip 3.

[0041] The connecting strip 3 includes a straight portion and a vertical portion, and a rubber strip 5 is installed between the vertical portion of the connecting strip 3 and the side wall of the screen box 1 on one side thereof. The rubber strip 5 is in sealing contact with the inner wall of the screen box 1 on one side thereof.

[0042] A plurality of stepped holes 14 are provided on the straight portion of the connecting strip 3, a lower hole concentric with the stepped hole 14 is provided at the lower end of the rubber strip 5, an inner sleeve 10 is fixed in the lower hole, a plurality of support rods 11 are evenly distributed and fixed on the outer circumference of the inner sleeve 10, the support rods 11 extend into the rubber strip 5, and countersunk screws penetrate the stepped holes 14 and are threadedly connected to the inner sleeve 10.

[0043] The countersunk screw connects the rubber strip 5 and the connecting strip 3 through the inner sleeve 10, and the connection strength between the rubber strip 5 and the connecting strip 3 is high.

[0044] A slide bar 12 is fixed to the side of the vertical portion of the connecting strip 3 facing the rubber strip 5. The cross section of the slide bar 12 is inverted trapezoidal. A trapezoidal groove 13 is provided on the rubber strip 5. The slide bar 12 is slidably engaged in the trapezoidal groove 13. The cooperation between the slide bar 12 and the trapezoidal groove 13 can further improve the stability of the connection between the rubber strip 5 and the connecting strip 3.

[0045] A plug strip 6 is fixed at the upper end of the rubber strip 5. The plug strip 6 is made of rubber and is integrally formed with the rubber strip 5. The plug strip 6 includes a vertical portion and an inclined portion at the upper end of the vertical portion. The vertical portion and the inclined portion of the plug strip 6 are integrally formed. The inclined portion of the plug strip 6 is inclined downward away from one end of the vertical portion of the plug strip 6. The vertical portion of the plug strip 6 is in sealing contact with the inner wall of the screen box 1 on one side thereof. The screen frame 8 is located between the plug strip 6 and the rubber strip 5. The vertical portion of the plug strip 6 is located between the screen frame 8 and the screen box 1. The screen frame 8 and the screen box 1 are tightly against the vertical portion of the plug strip 6. The screen frame 8 is in sealing contact with the plug strip 6 and the rubber strip 5. A screen mesh 9 is fixed inside the screen frame 8.

[0046] Inside the sieve box 1 above the sieve frame 8, a plurality of stoppers 15 are provided. The upper end of the stopper 15 is fixedly connected to the sieve box 1, and the lower end of the stopper 15 abuts tightly against the upper end of the sieve frame 8. The stopper 15 can block the sieve frame 8, and when the sieve box 1 drives the sieve frame 8 and the sieve mesh 9 to move, it can prevent the sieve frame 8 and the sieve mesh 9 from detaching from the sieve box 1.

[0047] During installation, connect the connecting bar 3 with the rubber strip 5. Slide the sliding bar 12 into the trapezoidal groove 13 in advance, and then make the countersunk head screw pass through the stepped hole 14 on the straight part of the connecting bar 3 and then be threadedly connected to the inner sleeve 10. Then place the connecting bar 3 on the supporting bar 2, and use the bolt 4 to fixedly connect the supporting bar 2 and the connecting bar 3. Then insert the sieve frame 8 between the plug strip 6 and the rubber strip 5. Install the stopper 15 in the sieve box 1 so that the lower end of the stopper 15 abuts tightly against the upper end of the sieve frame 8. When the stopper 15 becomes loose, due to the vertical part of the plug strip 6 between the sieve frame 8 and the sieve box 1, after the sieve frame 8 and the sieve box 1 slide relative to each other, it can prevent the sieve box 1 and the sieve frame 8 from being worn.

[0048] At this time, the sieve frame 8 is hermetically connected to the sieve box 1 through the rubber strip 5 and the plug strip 6, and the sealing performance is good. The rubber strip 5 can damp the sieve frame 8. The vertical part of the plug strip 6 is located between the sieve frame 8 and the sieve box 1, which can prevent the drill cuttings of the well fluid from entering between the sieve frame 8 and the sieve box 1. When the stopper 15 becomes loose, after the sieve frame 8 and the sieve box 1 slide relative to each other, there will be drill cuttings between the sieve frame 8 and the sieve box 1, resulting in wear of the sieve box 1 and the sieve frame 8.

[0049] Embodiment 2: On the basis of Embodiment 1, as shown in Figure 1 A plurality of elastic sheets 7 are fixed inside the plug strip 6. The elastic sheet 7 includes a vertical part and an inclined part located at the upper end of the vertical part. The vertical part and the inclined part of the elastic sheet 7 are integrally formed. The vertical part of the elastic sheet 7 is located inside the vertical part of the plug strip 6, and the inclined part of the elastic sheet 7 is located inside the inclined part of the plug strip 6.

[0050] The elastic sheet 7 can make the inclined part of the plug strip 6 closely abut against the upper end of the sieve frame 8. After the sieve frame 8 and the sieve box 1 tightly abut against the vertical part of the plug strip 6, the vertical part of the elastic sheet 7 is clamped by the sieve frame 8 and the sieve box 1. Under the elastic force of the elastic sheet 7, after the sieve frame 8 is located between the inclined part of the plug strip 6 and the rubber strip 5, the inclined part of the elastic sheet 7 can force the inclined part of the plug strip 6 to tightly abut against the upper end of the sieve frame 8, which can improve the sealing performance between the sieve frame 8 and the plug strip 6 and can improve the sealing time effect of the sieve frame 8.

[0051] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A vibrating screen mesh sealing strip, comprising a support strip (2) fixed to the inner wall of a screen box (1), characterized in that: The upper end of the support strip (2) is detachably fixedly connected with a connecting strip (3) having an inverted L-shaped cross section, the connecting strip (3) comprising a straight portion and a vertical portion, a rubber strip (5) is installed between the vertical portion of the connecting strip (3) and the side wall of the screen box (1) on one side thereof, the rubber strip (5) is in sealing contact with the inner wall of the screen box (1) on one side thereof, a plug strip (6) is fixed at the upper end of the rubber strip (5), the plug strip (6) and the rubber strip (5) are integrally formed, the plug strip (6) comprises a vertical portion and an inclined portion at the upper end of the vertical portion, the vertical portion and the inclined portion of the plug strip (6) are The plug strip (6) is integrally formed, the inclined portion of the plug strip (6) is inclined downward away from one end of the vertical portion of the plug strip (6), the vertical portion of the plug strip (6) is in sealing contact with the inner wall of the screen box (1) on one side thereof, the screen frame (8) is located between the plug strip (6) and the rubber strip (5), the vertical portion of the plug strip (6) is located between the screen frame (8) and the screen box (1), the screen frame (8) and the screen box (1) are tightly against the vertical portion of the plug strip (6), the screen frame (8) is in sealing contact with the plug strip (6) and the rubber strip (5), and a screen mesh (9) is fixed in the screen frame (8).

2. A vibrating screen mesh sealing strip according to claim 1, characterized in that: The plug strip (6) is made of rubber.

3. The vibrating screen mesh sealing strip according to claim 1, characterized in that: A plurality of elastic sheets (7) are fixed inside the plug strip (6), the elastic sheet (7) comprising a vertical portion and an inclined portion located at the upper end of the vertical portion, the vertical portion and the inclined portion of the elastic sheet (7) being integrally formed, the vertical portion of the elastic sheet (7) being located inside the vertical portion of the plug strip (6), and the inclined portion of the elastic sheet (7) being located inside the inclined portion of the plug strip (6).

4. The vibrating screen mesh sealing strip according to claim 1, characterized in that: A sliding bar (12) is fixed on one side of the vertical portion of the connecting strip (3) facing the rubber strip (5), the cross section of the sliding bar (12) is in an inverted trapezoidal shape, a trapezoidal groove (13) is provided on the rubber strip (5), and the sliding bar (12) is slidably engaged in the trapezoidal groove (13).

5. The vibrating screen mesh sealing strip according to claim 1, characterized in that: A plurality of stepped holes (14) are formed on the straight portion of the connecting strip (3); a lower hole concentric with the stepped hole (14) is formed at the lower end of the rubber strip (5); an inner sleeve (10) is fixed in the lower hole; a plurality of support rods (11) are evenly distributed and fixed on the outer circumference of the inner sleeve (10); the support rods (11) extend into the rubber strip (5); countersunk screws penetrate the stepped holes (14) and are threadedly connected to the inner sleeve (10).

6. The vibrating screen mesh sealing strip according to claim 1, characterized in that: A plurality of bolts (4) are provided through the support bar (2), and the bolts (4) are threadedly connected to the connecting bar (3).

7. The vibrating screen mesh sealing strip according to claim 1, characterized in that: A plurality of baffles (15) are arranged in the screen box (1) above the screen frame (8); the upper ends of the baffles (15) are fixedly connected to the screen box (1), and the lower ends of the baffles (15) are tightly against the upper end of the screen frame (8).

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