Pressure balance expansion joint

Abstract

The utility model belongs to the technical field of rubber joints, and particularly relates to a pressure balance expansion joint which comprises an upper connecting plate and a lower connecting plate, the upper connecting plate is fixedly connected with the upper end of a first rubber body through a bolt, and the lower end of the first rubber body is connected with a second rubber body through a first flange. The lower end of the second rubber body is fixedly connected with the third rubber body through the second flange, the upper connecting plate is fixedly connected with the second flange through the first connecting piece, and the lower connecting plate is fixedly connected with the first flange through the second connecting piece. The joint device has the beneficial effects that by arranging the first connecting piece and the second connecting piece, a worker can quickly mount and dismount the joint device, time and labor are saved during operation, mounting is convenient and fast, and the working efficiency is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of rubber joints, in particular to a pressure balanced expansion joint. Background Art

[0002] Rubber joints are hollow rubber products used for flexible connections between metal pipes. This product can reduce vibration and noise, and compensate for thermal expansion and contraction caused by temperature changes.

[0003] The existing rubber joint device can only achieve a small range of displacement, has limited absorption of displacement in all directions, and has poor effect on pipeline shock absorption. It is also limited in reducing the noise generated by pipeline operation, and the sound reduction effect is not good. Some structures on the market are made of steel. Although steel joints can achieve universal displacement to a certain extent, the weight and volume of the joints are particularly large, which is very inconvenient to use, and the installation is cumbersome, time-consuming and labor-intensive. Utility Model Content

[0004] The purpose of the utility model is to provide a pressure balanced expansion joint in order to solve the above problems.

[0005] The utility model achieves the above-mentioned purpose through the following technical solutions:

[0006] A pressure-balanced expansion joint, comprising an upper connecting plate and a lower connecting plate, wherein the upper connecting plate is fixedly connected to the upper end of a first rubber body by bolts, the lower end of the first rubber body is connected to a second rubber body by a first flange, the lower end of the second rubber body is fixedly connected to a third rubber body by a second flange, the upper connecting plate is fixedly connected to the second flange by a first connecting piece, and the lower connecting plate is fixedly connected to the first flange by a second connecting piece;

[0007] The first connecting member includes a plurality of first threaded rods, the upper and lower ends of which are fixed to the upper connecting plate and the second flange by nuts respectively, and the first threaded rods do not contact the first flange body; the second connecting member includes a plurality of second threaded rods, the upper and lower ends of which are fixed to the lower connecting plate and the first flange by nuts respectively, and the second threaded rods do not contact the second flange body.

[0008] Preferably, a plurality of the first threaded rods are evenly arranged between the upper connecting plate and the second flange, and a plurality of the second threaded rods are evenly arranged between the lower connecting plate and the first flange.

[0009] Preferably, the first rubber body and the third rubber body have the same shape and structure.

[0010] Preferably, the diameter of the second rubber body is larger than that of the first rubber body and the third rubber body.

[0011] Preferably, the first flange comprises a flange plate body, an upper annular plate is arranged at the upper end of the flange plate body, a lower annular plate is arranged at the lower end of the flange plate body, and an inner diameter of the lower annular plate is greater than an inner diameter of the upper annular plate.

[0012] Preferably, the second flange has the same shape and structure as the first flange, the upper annular plate in the second flange is located at the lower end of the flange body, and the lower annular plate is located at the upper end of the flange body.

[0013] Preferably, the first rubber body, the second rubber body and the third rubber body are flexible rubber joints.

[0014] The beneficial effects are: the utility model can realize that the joint device can absorb displacement in all directions, does not transmit the thrust of the pipeline, can limit the displacement beyond the range, reduce the noise and vibration of the pipeline operation, and at the same time will not transmit the vibration, thus balancing the pipeline difference; by setting the first connecting piece and the second connecting piece, the staff can quickly install and disassemble the joint device, which saves time and effort in operation, is more convenient to install, and improves work efficiency. 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 described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0016] Figure 1 It is a stereoscopic diagram of a pressure-balanced expansion joint described in the utility model;

[0017] Figure 2 It is a cross-sectional view of a pressure-balanced expansion joint described in the utility model;

[0018] Figure 3 It is a partial structural schematic diagram of a pressure-balanced expansion joint described in the utility model;

[0019] Figure 4 It is a top view of a first flange of a pressure-balanced expansion joint described in the utility model;

[0020] Figure 5 It is a bottom view of the first flange of a pressure-balanced expansion joint described in the utility model.

[0021] The following are the descriptions of the reference numerals:

[0022] 1. Upper connecting plate; 2. Flange plate body; 3. Lower annular plate; 4. Upper annular plate; 5. First threaded rod; 6. Second threaded rod; 7. First rubber body; 8. Second rubber body; 9. Lower connecting plate; 10. Third rubber body. DETAILED DESCRIPTION

[0023] The following is a further explanation of the technical solution of the utility model in conjunction with the accompanying drawings:

[0024] like Figure 1-Figure 5 As shown, a pressure-balancing expansion joint comprises an upper connecting plate 1 and a lower connecting plate 9, wherein the upper connecting plate 1 is fixedly connected to the upper end of a first rubber body 7 by bolts, the lower end of the first rubber body 7 is connected to a second rubber body 8 by a first flange, the lower end of the second rubber body 8 is fixedly connected to a third rubber body 10 by a second flange, the upper connecting plate 1 is fixedly connected to the second flange by a first connecting piece, and the lower connecting plate 9 is fixedly connected to the first flange by a second connecting piece.

[0025] The first rubber body 7 and the third rubber body 10 have the same shape and structure, the diameter of the second rubber body 8 is larger than the first rubber body 7 and the third rubber body 10, the second rubber body 8 is located between the first rubber body 7 and the third rubber body 10, and the first rubber body 7, the second rubber body 8 and the third rubber body 10 are flexible rubber joints.

[0026] The first flange includes a flange plate body 2, an upper annular plate 4 is arranged at the upper end of the flange plate body 2, and the upper annular plate 4 is fixedly connected to the lower end of the first rubber body 7 by bolts, and a lower annular plate 3 is arranged at the lower end of the flange plate body 2, and the inner diameter of the lower annular plate 3 is larger than the inner diameter of the upper annular plate 4, and the lower annular plate 3 is fixedly connected to the upper end of the second rubber body 8 by bolts.

[0027] The second flange has the same shape and structure as the first flange. The upper annular plate 4 in the second flange is located at the lower end of the flange plate body 2, and the lower annular plate 3 is located at the upper end of the flange plate body 2. The lower end of the second rubber body 8 is fixedly connected to the lower annular plate 3 on the second flange by bolts, and the upper end of the third rubber body 10 is fixedly connected to the upper annular plate 4 on the second flange by bolts, and the lower end of the third rubber body 10 is fixedly connected to the lower connecting plate 9 by bolts.

[0028] The first connecting member includes six first threaded rods 5, the upper ends of the first threaded rods 5 are fixedly connected to the upper connecting plate 1 through nuts, and the lower ends of the first threaded rods 5 are fixedly connected to the flange plate body 2 on the second flange body through nuts. The six first threaded rods 5 are evenly arranged between the upper connecting plate 1 and the second flange, and the first threaded rods 5 do not contact the first flange body.

[0029] The second connecting member includes six second threaded rods 6. The lower end of the first threaded rod 5 is fixedly connected to the lower connecting plate 9 through a nut. The upper end of the first threaded rod 5 is fixedly connected to the flange plate body 2 on the first flange body through a nut. The six second threaded rods 6 are evenly arranged between the lower connecting plate 9 and the first flange, and the second threaded rods 6 do not contact the second flange body.

[0030] Working principle: When in use, the first rubber body 7 is fixed to the upper connecting plate 1 by bolts, the first flange is fixed to the lower end of the first rubber body 7, the lower end of the first flange is fixedly connected to the upper end of the second rubber body 8, the lower end of the second rubber body 8 is fixed to the upper end of the second flange, the upper end of the third rubber body 10 is fixed to the lower end of the second flange, the lower end of the third rubber body 10 is fixed to the lower connecting plate 9 by bolts, and then the upper connecting rod is fixedly connected to the second flange by the first threaded rod 5, and the first flange is fixedly connected to the lower connecting plate 9 by the second threaded rod 6.

[0031] The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments, and the above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, and these changes and improvements fall within the scope of the utility model to be protected.

Claims

1. A pressure-balanced expansion joint, comprising an upper connecting plate (1) and a lower connecting plate (9), characterized in that: The upper connecting plate (1) is fixedly connected to the upper end of the first rubber body (7) by bolts, the lower end of the first rubber body (7) is connected to the second rubber body (8) by a first flange, the lower end of the second rubber body (8) is fixedly connected to the third rubber body (10) by a second flange, the upper connecting plate (1) is fixedly connected to the second flange by a first connecting piece, and the lower connecting plate (9) is fixedly connected to the first flange by a second connecting piece; The first connecting member comprises a plurality of first threaded rods (5), the upper and lower ends of the first threaded rods (5) are respectively fixed to the upper connecting plate (1) and the second flange by nuts, and the first threaded rods (5) are not in contact with the first flange body; the second connecting member comprises a plurality of second threaded rods (6), the upper and lower ends of the second threaded rods (6) are respectively fixed to the lower connecting plate (9) and the first flange by nuts, and the second threaded rods (6) are not in contact with the second flange body.

2. A pressure balanced expansion joint according to claim 1, characterized in that: A plurality of the first threaded rods (5) are evenly arranged between the upper connecting plate (1) and the second flange, and a plurality of the second threaded rods (6) are evenly arranged between the lower connecting plate (9) and the first flange.

3. A pressure balanced expansion joint according to claim 2, characterized in that: The first rubber body (7) and the third rubber body (10) have the same shape and structure.

4. A pressure balanced expansion joint according to claim 3, characterized in that: The diameter of the second rubber body (8) is larger than that of the first rubber body (7) and the third rubber body (10).

5. A pressure balanced expansion joint according to claim 1, characterized in that: The first flange comprises a flange plate body (2), an upper annular plate (4) is arranged at the upper end of the flange plate body (2), and a lower annular plate (3) is arranged at the lower end of the flange plate body (2), and the inner diameter of the lower annular plate (3) is greater than the inner diameter of the upper annular plate (4).

6. A pressure balanced expansion joint according to claim 5, characterized in that: The second flange has the same shape and structure as the first flange. The upper annular plate (4) in the second flange is located at the lower end of the flange body (2), and the lower annular plate (3) is located at the upper end of the flange body (2).

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