Urban gas supercharging device

Abstract

The utility model relates to the technical field of gas pressurization, in particular to an urban gas pressurization device which comprises a cylinder body, the cylinder body is fixed on the bottom surface of a support, two side walls of the cylinder body are respectively provided with a gas inlet and two gas outlets, a piston is movably sleeved in the cylinder body, the piston is connected with a servo electric cylinder through a connecting rod, and the servo electric cylinder is fixed on the top surface of the support. An annular first groove and an annular second groove are formed in the side wall of the piston in parallel, an elastic first sealing ring is embedded in the first groove in a matched mode, a rigid second sealing ring is embedded in the second groove in a matched mode, an inner ring of the second sealing ring is connected with four outer ring arc strips through springs, and the outer ring arc strips can move outwards through extension of the springs to compensate abrasion. According to the piston type supercharging device, two-stage sealing is arranged at the positions, penetrating through the connecting rod, of the piston and the top wall of the cylinder body, a second sealing ring is of an innovative spring-split ring structure, namely, the four-piece type split ring design, all arc sections can independently move in the radial direction under the action of the spring to continuously compensate abrasion, and the service life is prolonged.

Description

TECHNICAL FIELD

[0001] The utility model relates to gas pressurization technical field especially is concerned with a kind of pressurizing device for city gas. BACKGROUND

[0002] Part of user due to being at the end of gas supply pipe network, when gas peak period, gas appears insufficient pressure, to ensure the gas pressure of user, generally can be by installing pressurizing device such as piston pressurizing pump to the household gas is pressurized.

[0003] Piston pressurizing pump is compressed and pressurized by changing the volume in cylinder by reciprocating motion of piston in cylinder, but the sealing element between piston and cylinder or the sealing element between connecting rod and cylinder body is easy to wear in long-term operation, leading to gas leakage, poor pressurization effect;Meanwhile, the sealing element in piston pressurizing pump is generally of rubber material, but piston will generate heat by friction due to reciprocating motion, and the sealing element of rubber material is easy to accelerate aging by heat, thereby accelerating wear and reducing service life.

[0004] Therefore, the present application provides a kind of pressurizing device for city gas to solve the problems raised in the above background. SUMMARY

[0005] The utility model aims at providing a kind of pressurizing device for city gas, solve the problems such as the sealing element of existing piston pressurizing pump is easy to wear, poor sealing effect.

[0006] To solve the above technical problems, the utility model provides a kind of pressurizing device for city gas, including including cylinder body, cylinder body is fixed on the bottom surface of support, the two side walls of cylinder body are provided with gas inlet and two gas outlets respectively, piston is movably sleeved in cylinder body, piston is connected with servo cylinder by connecting rod, servo cylinder is fixed on the top surface of support;Annular first groove and second groove are arranged in parallel on the side wall of piston, the first sealing ring of elasticity is adaptively nested in the first groove, the second sealing ring of rigidity is adaptively nested in the second groove, the inner ring of second sealing ring is connected with four outer ring arc strips by spring, and the outer ring arc strip can be displaced outward to compensate wear by spring elongation.

[0007] The further improvement of the utility model technical scheme is that: the first sealing ring is the annular structure of U-shaped groove shape, and the first sealing ring further includes a vertical ring abutting against the inner wall of the first groove, and the bottom end of the vertical ring is integrally connected with an arc ring on the outside.

[0008] The further improvement of the utility model technical scheme is that: the second sealing ring is the annular structure with concave arc surface on the outside, and the second sealing ring further includes an inner ring abutting against the inner wall of the second groove, and a horizontal connecting ring A is vertically arranged on the center of the outer arc surface of the inner ring, and an outer ring arc ring is arranged on the upper surface edge of the connecting ring A.

[0009] The further improvement of the utility model technical scheme lies in: a plurality of positioning columns A are evenly and vertically arranged on the outer arc surface of the inner ring below the connecting ring A, the positioning column is sleeved in one end of the spring, the other end of the spring is sleeved with a positioning column B, and the positioning column B is vertically arranged on the outer arc wall of the inner ring arc strip.

[0010] The further improvement of the utility model technical scheme lies in: the radian of the outer ring arc strip is 90°, the four outer ring arc strips are sequentially abutted at the two ends, and the upper surfaces of the four outer ring arc strips abut the edge of the lower surface of the connecting ring A.

[0011] The further improvement of the utility model technical scheme lies in: a circular hole is arranged at the center of the top wall of the cylinder body, a connecting rod is adaptively sleeved in the circular hole, two annular grooves A and B are arranged in parallel on the inner wall of the circular hole, a flexible sealing ring A is adaptively nested in the groove A, and a rigid sealing ring B is adaptively nested in the groove B.

[0012] The further improvement of the utility model technical scheme lies in: the sealing ring A is a U-shaped groove-shaped annular structure, the sealing ring A further comprises a vertical ring A abutting against the inner wall of the groove A, and the vertical ring A is integrally connected with an arc ring A at the inner side of the bottom end.

[0013] The further improvement of the utility model technical scheme lies in: the sealing ring B further comprises an outer ring abutting against the inner wall of the groove B, a horizontal connecting ring B is vertically arranged at the center of the inner arc surface of the outer ring, an inner ring arc ring A is arranged at the edge of the upper surface of the connecting ring B, a plurality of positioning columns C are evenly and vertically arranged on the inner arc surface of the outer ring below the connecting ring B, the positioning column C is movably sleeved in one end of the spring B, the other end of the spring B is sleeved with a positioning column D, and the positioning column D is vertically arranged on the outer arc wall of the inner ring arc strip.

[0014] The further improvement of the utility model technical scheme lies in: the radian of the inner ring arc strip is 90°, the four inner ring arc strips are sequentially abutted at the two ends, and the lower surfaces of the four inner ring arc strips abut the edge of the upper surface of the connecting ring B.

[0015] The further improvement of the utility model technical scheme lies in: the first sealing ring and the sealing ring A are both made of flexible rubber material, and the second sealing ring and the sealing ring B are both made of rigid metal material.

[0016] By adopting the above technical scheme, the utility model has the following beneficial effects:

[0017] 1. The utility model provides a kind of pressure increasing device for urban gas, the pressure increasing device is set two-stage sealing to piston and cylinder top surface round hole, adopts rubber+metal double material combination sealing, forms the first stage for elastic sealing, the second stage is the rigid sealing ladder type sealing system;Upper rubber arc ring plays elastic advantage, realizes dynamic sealing by pre-tightening force, absorbs gas pulsating pressure;Lower metal ring bears main sealing function, rigid high-hardness material can resist extreme temperature (100-300 ℃) and high pressure (>10MPa) environment, double ring collaborative work makes leakage rate reduce 40%-60%.

[0018] 2, the utility model provides a kind of pressure increasing device for urban gas, the metal sealing ring adopts innovative "spring-split ring" structure, i.e. four petal split ring design, can make each arc segment move independently along radial, spring group provides sustained compensation force, still can keep >90% initial contact pressure when wearing 0.1mm, compared with traditional integral type metal ring, prolongs service life 2-3 times.

[0019] 3, the utility model provides a kind of pressure increasing device for urban gas, the rubber sealing ring is U-shaped groove-like annular structure, arc section forms arch bridge effect, reduces the contact area of sealing ring and cylinder inner wall or connecting rod outer wall, reduces friction loss. DETAILED DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the specific embodiments of the utility model or the technical solutions in the prior art, the following will briefly introduce the drawings needed to be used in the specific embodiments or prior art description, and obviously, the drawings in the following description are some embodiments of the utility model, and for those skilled in the art, other drawings can also be obtained without creative labor according to these drawings.

[0021] Figure 1 It is the overall schematic view of a kind of pressure increasing device for urban gas;

[0022] Figure 2 It is the front view of the cylinder in Figure 1 ;

[0023] Figure 3 It is the local enlarged view of cylinder top wall sealing place;

[0024] Figure 4 It is the local enlarged view of piston sealing;

[0025] Figure 5 It is the structure schematic view of piston;

[0026] Figure 6 It is the structure schematic view of first sealing ring;

[0027] Figure 7A bottom view schematic diagram of a second sealing ring;

[0028] Figure 8 A sectional view of a second sealing ring;

[0029] Figure 9 A sectional view of a sealing ring A;

[0030] Figure 10 A sectional view of a sealing ring B.

[0031] Fig. 1 is a cylinder; 11 is an air inlet; 12 is an air outlet; 13 is a round hole; 131 is a groove A; 132 is a groove B; 2 is a bracket; 3 is a piston; 31 is a first groove; 32 is a second groove; 4 is a connecting rod; 5 is a servo cylinder; 6 is a first sealing ring; 61 is a vertical ring; 62 is an arc-shaped ring; 7 is a second sealing ring; 71 is an inner ring; 72 is a connecting ring A; 73 is an outer ring arc ring; 74 is a positioning column A; 75 is a spring; 76 is a positioning column B; 77 is an outer ring arc strip; 8 is a sealing ring A; 81 is a vertical ring A; 82 is an arc-shaped ring A; 9 is a sealing ring B; 91 is an outer ring; 92 is a connecting ring B; 93 is an inner ring arc ring; 94 is a positioning column C; 95 is a spring B; 96 is a positioning column D; 97 is an inner ring arc strip. DETAILED DESCRIPTION

[0032] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0033] In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second", "third" are only for the purpose of description, and cannot be understood as indicating or implying relative importance.

[0034] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0035] The present invention will be further explained below with reference to specific embodiments.

[0036] like Figures 1-10 As shown in the figure, this embodiment provides a booster device for urban gas, including a cylinder body 1, which is fixed to the bottom surface of a bracket 2. An air inlet 11 and two air outlets 12 are respectively provided on the two side walls of the cylinder body 1. A piston 3 is movably mounted inside the cylinder body 1. The piston 3 is connected to a servo electric cylinder 5 via a connecting rod 4, and the servo electric cylinder 5 is fixed to the top surface of the bracket 2. A first annular groove 31 and a second annular groove 32 are arranged parallel to each other on the side wall of the piston 3. A first elastic sealing ring 6 is fitted into the first groove 31, and a rigid second sealing ring 7 is fitted into the second groove 32. The inner ring 71 of the second sealing ring 7 is connected to four outer ring arc strips 77 via springs 75. The outer ring arc strips 77 can be extended outward by the springs 75 to compensate for wear. Specifically, a one-way valve is installed in both the air inlet 11 and the two air outlets 12, and a pressure valve is installed in both air outlets 12 (as shown in the figure). (Not shown) The piston 3 includes a body and a bottom cover. A first groove 31 is formed in the middle of the piston 3 body. A first sealing ring 6 is elastically stretchable and fits into the first groove 31. The outer side of the arc-shaped ring 62 of the first sealing ring 6 abuts against the inner wall of the cylinder 1, providing a primary elastic seal for the piston 3. A second groove 32 is formed at the bottom end of the piston 3 body. A second sealing ring 7 is fitted into the second groove 32. The piston 3 bottom cover is then tightened with bolts. The inner ring 71 of the second sealing ring 7 is tightly attached to the inner wall of the second groove 32. The inner ring 71 is connected to one side of four outer ring arc strips 77 that are joined together to form a circle by a spring 75. The other side of the outer ring arc strips 77 abuts against the inner wall of the cylinder 1, providing a secondary rigid seal for the cylinder 1. At the same time, during the reciprocating motion of the piston 3, the outer ring arc strips 77 can compensate for wear under the continuous elastic force provided by the spring 75, thus improving service life.

[0037] like Figure 4 , Figure 6As shown, in the embodiment, the first sealing ring 6 is a U-shaped groove-shaped annular structure, and further comprises a vertical ring 61 abutting the inner wall of the first groove 31, and the bottom end of the vertical ring 61 is integrally connected with an arc-shaped ring 62; specifically, the first sealing ring 6 abuts the inner wall of the cylinder body 1 through the arc-shaped ring 62, and the arc-shaped section of the arc-shaped ring 62 forms an "arch bridge effect", thereby reducing the contact area between the first sealing ring 6 and the inner wall of the cylinder body 1, and thus reducing the friction loss.

[0038] As shown in Figure 4 , Figure 7 , Figure 8 As shown, in the embodiment, the second sealing ring 7 is an annular structure with a concave arc outer side, and further comprises an inner ring 71 abutting the inner wall of the second groove 32, a horizontal connecting ring A72 integrally arranged vertically at the center of the outer arc surface of the inner ring 71, an outer ring arc ring 73 arranged on the upper surface edge of the connecting ring A72, a plurality of positioning columns A74 arranged vertically and uniformly below the connecting ring A72 on the outer arc surface of the inner ring 71, a positioning column B76 arranged in the inner arc wall of an outer ring arc strip 77, and a spring 75 sleeved on one end of the positioning column A74 and the other end of the positioning column B76; the arc of the outer ring arc strip 77 is 90°, the four outer ring arc strips 77 are sequentially abutted at the two ends, and the upper surfaces of the four outer ring arc strips 77 abut the lower surface edge of the connecting ring A72; specifically, the second sealing ring 7 is a double-layer annular body, the first layer is the inner ring 71 which is adapted to abut the inner wall of the second groove 32, the middle part of the outer arc surface of the inner ring 71 is connected with the second layer through the connecting ring A72, the second layer comprises the outer ring arc ring 73 and the four outer ring arc strips 77 at the lower end of the connecting ring A72, the four outer ring arc strips 77 are spliced into a ring with the same shape and structure as the outer ring arc ring 73, the height of the outer ring arc ring 73 plus the height of the outer ring arc strip 77 is equal to the height of the inner ring 71, and each outer ring arc strip 77 is connected with the inner ring 71 through three positioning columns B76 and three springs 75, and the use life of the second sealing ring 7 is improved by adopting the innovative "spring-split ring" structure, i.e., the four-petal split ring design of the outer ring arc strip 77, so that each outer ring arc strip 77 can move independently in the radial direction.

[0039] As shown in Figure 2 , Figure 3 , Figure 9As shown, in the embodiment, a circular hole 13 is arranged at the center of the top wall of the cylinder body 1, the connecting rod 4 is fitted and sleeved in the circular hole 13, two annular grooves A131 and B132 are arranged in parallel on the inner wall of the circular hole 13, the elastic sealing ring A8 is fitted and nested in the groove A131, and the rigid sealing ring B9 is fitted and nested in the groove B132; the sealing ring A8 is a U-shaped groove-shaped annular structure, further comprises a vertical ring A81 abutting against the inner wall of the groove A131, and the bottom end of the vertical ring A81 is integrally connected with an arc-shaped ring A82; the first sealing ring 6 and the sealing ring A8 are both made of elastic rubber material; specifically, the sealing mode between the top wall of the cylinder body 1 and the connecting rod 4 is similar to that at the piston 3, and is also a two-stage sealing, the first stage is the elastic sealing of the sealing ring A8, and the second stage is the rigid sealing of the sealing ring B9; the structure of the sealing ring A8 is similar to that of the first sealing ring 6, and the arc surface of the arc-shaped ring A82 of the sealing ring A8 abuts against the connecting rod 4 moving up and down.

[0040] As shown in Figure 3 , Figure 10 In the embodiment, the sealing ring B9 further comprises an outer ring 91 abutting against the inner wall of the groove B132, a horizontal connecting ring B92 is integrally and vertically arranged at the center of the inner arc surface of the outer ring 91, an inner ring arc ring A93 is arranged at the edge of the upper surface of the connecting ring B92, a plurality of positioning columns C94 are uniformly and vertically arranged below the connecting ring B92 on the inner arc surface of the outer ring 91, the positioning column C94 is movably sleeved at one end of a spring B95, a positioning column D96 is sleeved at the other end of the spring B95, and the positioning column D96 is integrally and vertically arranged on the outer arc wall of an inner ring arc strip 97; the curvature of the inner ring arc strip 97 is 90°, the four inner ring arc strips 97 are sequentially abutted at the two ends, and the lower surfaces of the four inner ring arc strips 97 abut against the edge of the upper surface of the connecting ring B92; the second sealing ring 7 and the sealing ring B9 are both made of rigid metal material; specifically, the sealing ring B9 is similar in structure to the second sealing ring 7, but different in size, the sealing ring B9 is sleeved in the upper groove B132, and a sealing cover is additionally arranged on the top surface of the sealing ring B9, so that the sealing ring B9 is convenient to install; the structure of the sealing ring B9 is similar to that of the second sealing ring 7, the outer ring 91 of the sealing ring B9 is a fixed abutting ring, the inner arc surface of the inner ring arc strip 97 abuts against the connecting rod 4, and the inner ring arc strip 97 moves inward under the action of the spring B95 to compensate for wear.

[0041] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, but not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A pressure boosting device for city gas, characterized by comprising: The utility model provides a kind of air cylinder, including cylinder (1), cylinder (1) is fixed on the bottom surface of support (2), cylinder (1) two side walls are respectively provided with air inlet (11) and two gas outlets (12), cylinder (1) is movably sleeved piston (3), piston (3) is connected with servo cylinder (5) by connecting rod (4), servo cylinder (5) is fixed on the top surface of support (2);Piston (3) side wall is provided with annular first groove (31) and second groove (32) in parallel, first groove (31) is adapted to nest elastic first sealing ring (6) in, second groove (32) is adapted to nest rigid second sealing ring (7) in, the inner ring (71) of second sealing ring (7) is connected four outer ring arc strips (77) by spring (75), and outer ring arc strip (77) can be displaced outward by spring (75) elongation compensation wear.

2. The pressure boosting device for city gas according to claim 1, characterized by First sealing ring (6) is U-shaped groove-like annular structure, and first sealing ring (6) further includes vertical ring (61) abutting the inner wall of first groove (31), and the bottom end outside of vertical ring (61) is integrally connected with arc ring (62).

3. The pressure boosting device for city gas according to claim 1, characterized by Second sealing ring (7) is annular structure with concave arc surface on the outside, and second sealing ring (7) further includes inner ring (71) abutting the inner wall of second groove (32), and the center of outer arc surface of inner ring (71) is integrally and vertically provided with horizontal connecting ring A (72), and outer ring arc ring (73) is arranged on the upper surface edge of connecting ring A (72).

4. The pressure boosting device for city gas according to claim 3, characterized by A plurality of positioning columns A (74) are evenly and vertically arranged on the outer arc surface of inner ring (71) below connecting ring A (72), positioning column A (74) is sleeved in one end of spring (75), positioning column B (76) is sleeved in the other end of spring (75), and positioning column B (76) is integrally and vertically arranged in the inner arc wall of outer ring arc strip (77).

5. The pressure boosting device for city gas according to claim 4, wherein The radian of outer ring arc strip (77) is 90°, and the two ends of four outer ring arc strips (77) are sequentially abutted, and the upper surface of four outer ring arc strips (77) abuts the lower surface edge of connecting ring A (72).

6. The pressure boosting device for city gas according to claim 1, wherein The center of top wall of cylinder (1) is provided with a circular hole (13), and connecting rod (4) is adapted and sleeved in the circular hole (13), the inner wall of circular hole (13) is provided with two annular grooves A (131) and grooves B (132) in parallel, elastic sealing ring A (8) is adapted and nested in groove A (131), and rigid sealing ring B (9) is adapted and nested in groove B (132).

7. The pressure boosting device for city gas according to claim 6, characterized by Sealing ring A (8) is U-shaped groove-like annular structure, and sealing ring A (8) further includes vertical ring A (81) abutting the inner wall of groove A (131), and arc ring A (82) is integrally connected on the inner side of bottom end of vertical ring A (81).

8. The pressure boosting device for city gas according to claim 6, characterized by The sealing ring B (9) further comprises an outer ring (91) abutting against the inner wall of the groove B (132), a horizontal connecting ring B (92) vertically arranged at the center of the inner arc surface of the outer ring (91), an inner ring arc ring (93) arranged at the edge of the upper surface of the connecting ring B (92), a plurality of positioning columns C (94) uniformly and vertically arranged at the lower surface of the connecting ring B (92) on the inner arc surface of the outer ring (91), the positioning column C (94) movably sleeved at one end of the spring B (95), the other end of the spring B (95) sleeved with the positioning column D (96), and the positioning column D (96) integrally and vertically arranged at the outer arc wall of the inner ring arc strip (97).

9. The pressure boosting device for city gas according to claim 8, characterized by The inner ring arc strip (97) has an arc of 90°, and the four inner ring arc strips (97) are sequentially abutted at the two ends.

10. The pressure boosting device for city gas according to claim 9, characterized by The first sealing ring (6) and the sealing ring A (8) are made of elastic rubber material, and the second sealing ring (7) and the sealing ring B (9) are made of rigid metal material.

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