Negative pressure valve connecting elbow of negative pressure drainage system

Abstract

The utility model discloses a negative pressure valve connecting elbow of a negative pressure drainage system, and particularly relates to the technical field of elbow pipe fittings, the negative pressure valve connecting elbow comprises an elbow pipe, a straight pipe and a connecting pipe which are sequentially arranged from left to right, an extension pipe is arranged in the straight pipe, the elbow pipe is in flange connection with the straight pipe, the extension pipe is in flange connection with the connecting pipe, and a negative pressure valve is arranged on the connecting pipe. A sealing assembly is arranged at one end of the extension pipe, and an abutting disc used for abutting against the sealing assembly is arranged on the outer side of the extension pipe. A sealing plate is connected to a flange at the end, back on to the bent pipe, of the straight pipe, a first driving structure and a second driving structure are arranged on the sealing plate, the first driving structure is connected with the sealing assembly, and the second driving structure is connected with the abutting disc. The sealing assembly comprises a fixing ring, the fixing ring is fixedly connected to one end of the outer surface of the extension pipe, and the ring side of the fixing ring is sleeved with a sealing ring; the connecting elbow solves the technical problem that the installation applicability is reduced due to the fact that an existing connecting elbow does not have the installation compensation capacity.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of elbow pipe fitting, more specifically, the utility model relates to a negative pressure valve connecting elbow of negative pressure drainage system. BACKGROUND

[0002] The main function of the negative pressure valve in the negative pressure drainage system is to automatically adjust the pressure. In the negative pressure system, when the negative pressure exceeds the set value, the negative pressure valve will automatically close to prevent the equipment from being damaged by excessive negative pressure. At the same time, in the positive pressure system, when the pressure exceeds the set value, the negative pressure valve can also automatically adjust to release the excess pressure to protect the safety of the equipment and the workers. The connecting elbow is a pipe fitting used to change the direction of the pipeline and is commonly used in the pipeline system of water heating installation, industry, building and civil field. The connecting elbow can make the pipeline turn 90°, 45°, 180° and various degrees. In the negative pressure drainage system, the negative pressure valve is usually connected with the pipeline through the connecting elbow, therefore, the connecting elbow is one of the essential connecting accessories of the negative pressure valve.

[0003] When the current connecting elbow is used with the negative pressure valve, the size of the connecting elbow is limited, and when it is necessary to adjust the connection distance of the negative pressure valve on the connecting elbow, the current connecting elbow does not have the ability to install compensation, so a special connecting elbow pipe fitting combination needs to be used, which reduces the installation applicability.

[0004] The above information disclosed in the background is only used to increase the understanding of the background of the application, therefore, it can include the prior art known by those skilled in the art. UTILITY MODEL CONTENT

[0005] The utility model aims at providing a technical solution to solve the technical problem that the current connecting elbow does not have the ability to install compensation, which reduces the installation applicability.

[0006] In order to achieve the above-mentioned purpose, the utility model provides the following technical scheme: a negative pressure valve connecting elbow of negative pressure drainage system, including elbow, straight pipe and connecting pipe arranged in sequence from left to right, the straight pipe is provided with the extension pipe, the elbow is connected with the straight pipe flange, the extension pipe and the connecting pipe flange connection, the connecting pipe is provided with negative pressure valve, one end of the extension pipe is provided with sealing assembly, the outside of the extension pipe is provided with the abutting disc for the sealing assembly abutting;

[0007] The straight pipe flange is connected with the sealing plate at the end away from the elbow, the sealing plate is provided with driving structure one and driving structure two, the driving structure one is connected with the sealing assembly, and the driving structure two is connected with the abutting disc.

[0008] In a preferred embodiment, the sealing assembly comprises a fixing ring fixedly connected to one end of the outer surface of the extension pipe, a sealing ring sleeved on the ring side of the fixing ring, and a sealing pad arranged on the end side of the fixing ring.

[0009] In a preferred embodiment, the sealing pad is arranged in abutment with the abutment disc, the end side of the abutment disc is chamfered, and the end side of the sealing pad is integrally provided with a sealing portion complementary to the chamfered structure of the abutment disc.

[0010] In a preferred embodiment, the end side of the fixing ring is threadedly connected with a pair of supports, the supports are movably arranged through the abutment disc, and the sealing pad is movably inserted on the supports.

[0011] In a preferred embodiment, the driving structure one comprises a lead screw one, the lead screw one is threadedly connected to the sealing plate, one end of the lead screw one is rotatably connected to one of the supports, and the sealing plate is slidably connected with a light rod one, one end of the light rod one is fixedly connected to the other support.

[0012] In a preferred embodiment, the driving structure two comprises a lead screw two, the lead screw two is threadedly connected to the sealing plate, one end of the lead screw two is rotatably connected to the end side of the abutment disc, and the sealing plate is slidably connected with a light rod two, one end of the light rod two is fixedly connected to the end side of the abutment disc.

[0013] The technical effects and advantages of the utility model are as follows:

[0014] The negative pressure valve connecting elbow of the negative pressure drainage system, when the ability of the elbow installation compensation needs to be met, the straight pipe flange is connected to the elbow, the sealing assembly provides high sealing for the extension pipe arranged in the straight pipe, the corresponding sealing assembly and the abutment disc are driven to move by controlling the driving structure one and the driving structure two, the driving structure one can be used for adjusting the communication position of the extension pipe in the straight pipe, one end of the extension pipe can adapt to the installation position of the connecting pipe on the negative pressure valve, the driving structure two can adjust the abutment position of the abutment disc, so that the reliability of the sealing assembly and the abutment disc in abutment can be ensured, and therefore the use requirement of the negative pressure valve position installation compensation can be effectively met. BRIEF DESCRIPTION OF DRAWINGS

[0015] In order to more clearly illustrate the 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 embodiment or the prior art description. Obviously, the drawings in the following description are only exemplary, and for those skilled in the art, other implementation drawings can be obtained according to the provided drawings without creating labor.

[0016] Figure 1 It is a plane structure schematic view of the negative pressure valve connecting elbow of the negative pressure drainage system of the utility model;

[0017] Figure 2 It is a top view sectional view of the straight pipe and the extension pipe of the utility model;

[0018] Figure 3 It is a bottom view sectional view of the straight pipe and the extension pipe of the utility model;

[0019] Figure 4 It is the utility model Figure 2 A enlarged view of A part in the middle.

[0020] The reference signs are: 1, elbow; 2, straight pipe; 3, extension pipe; 4, connecting pipe; 5, negative pressure valve; 6, sealing plate; 7, sealing assembly; 71, fixed ring; 72, sealing ring; 73, sealing pad; 8, screw rod one; 81, light rod one; 9, abutting disc; 10, screw rod two; 101, light rod two; 11, support column. DETAILED DESCRIPTION

[0021] The embodiments of the utility model are described below by specific examples, and other advantages and effects of the utility model can be easily understood by those skilled in the art from the disclosed content of the specification. Obviously, the described examples are part of the embodiments of the utility model, not all. Based on the examples in the utility model, all other embodiments obtained by those skilled in the art without creative labor belong to the scope of protection of the utility model.

[0022] In combination with referring to Figures 1-4 The utility model provides a negative pressure valve connecting elbow of negative pressure drainage system, including from left to right in proper order setting elbow 1, straight pipe 2 and connecting pipe 4, be provided with extension pipe 3 in straight pipe 2, elbow 1 is connected with the flange of straight pipe 2, extension pipe 3 and connecting pipe 4 flange connection, be provided with negative pressure valve 5 on connecting pipe 4.

[0023] Straight pipe 2 can extend the pipeline path of elbow 1, and extension pipe 3 can further extend the pipeline path of straight pipe 2, negative pressure valve 5 can be assembled on connecting pipe 4 in a threaded connection mode, and the above flange connection mode can satisfy the convenience of disassembly and assembly between pipelines.

[0024] In the embodiment: one end of extension pipe 3 is provided with sealing assembly 7, sealing assembly 7 includes fixed ring 71, fixed ring 71 is fixedly connected to one end of the outer surface of extension pipe 3, sealing ring 72 is sleeved on the ring side of fixed ring 71, sealing ring 72 is slidingly connected to the inner pipe wall of straight pipe 2, and sealing pad 73 is arranged on the end side of fixed ring 71.

[0025] The extension pipe 3 is arranged in the straight pipe 2, the sealing ring 72 can provide dynamic sealing effect for the extension pipe 3 arranged in the straight pipe 2, the sealing ring 72 is annular sealing, so that the sealing property of the joint of the extension pipe 3 and the straight pipe 2 can be improved, and the sealing gasket 73 can further improve the annular sealing property of the joint of the extension pipe 3 and the straight pipe 2 through axial extrusion.

[0026] In the embodiment, the outer side of the extension pipe 3 is provided with an abutting disc 9 for abutting the sealing assembly 7, the sealing gasket 73 is arranged in abutment with the abutting disc 9, the end side of the abutting disc 9 is chamfered, and the end side of the sealing gasket 73 is integrally provided with a sealing part which is complementary to the chamfered structure of the abutting disc 9.

[0027] The size of the abutting disc 9 is matched with the size of the straight pipe 2, the abutting disc 9 is slidingly arranged in the straight pipe 2, the sealing gasket 73 can be extruded on the end side of the abutting disc 9 by controlling the sealing assembly 7 to move with the extension pipe 3, and the complementary structure of the abutting disc 9 and the sealing gasket 73 is arranged, so that the sealing gasket 73 can be extruded, the sealing property between the sealing gasket 73 and the abutting disc 9 is improved, and the sealing property of the joint of the extension pipe 3 and the straight pipe 2 is improved.

[0028] In the embodiment, the end side of the fixed ring 71 is threadedly connected with a pair of supports 11, the supports 11 are movably arranged through the abutting disc 9, and the sealing gasket 73 is movably inserted on the supports 11.

[0029] One end of the support 11 is threadedly connected with the fixed ring 71, so that the sealing gasket 73 can be assembled on the end side of the fixed ring 71.

[0030] In the embodiment, the end of the straight pipe 2 away from the elbow pipe 1 is flange-connected with a cover plate 6, the cover plate 6 is provided with a driving structure one, the driving structure one is connected with the sealing assembly 7, the driving structure one comprises a lead screw one 8, the lead screw one 8 is threadedly connected with the cover plate 6, one end of the lead screw one 8 is rotatably connected with one of the supports 11, and the cover plate 6 is slidingly connected with a light rod one 81, one end of the light rod one 81 is fixedly connected with the other support 11.

[0031] In the application, one end of the lead screw one 8 away from the support 11 is provided with a rotating part, so that the lead screw one 8 can be conveniently driven to rotate, the threaded transmission of the lead screw one 8 on the cover plate 6 can drive the extension pipe 3 to move in the straight pipe 2 under the guide sliding of the light rod one 81 on the fixed ring 71, so that the position of the end of the extension pipe 3 in the straight pipe 2 can be conveniently adjusted, and the telescopic cooperation of the straight pipe 2 and the extension pipe 3 can conveniently compensate the installation distance of the negative pressure valve 5.

[0032] It is worth noting that the supports 11 are arranged through the abutting disc 9, the abutting disc 9 is provided with a through slot, and the size of the through slot is greater than the diameter of the light rod one 81 and the lead screw one 8, so that the light rod one 81 or the lead screw one 8 can conveniently pass through the through slot.

[0033] In this embodiment: the driving structure two includes a screw rod two 10, which is threadedly connected to the sealing plate 6, and one end of the screw rod two 10 is rotatably connected to the end side of the abutting disc 9, and the sealing plate 6 is slidably connected with a light rod two 101, and one end of the light rod two 101 is fixedly connected to the end side of the abutting disc 9.

[0034] After the position of the extension pipe 3 is adjusted by the driving structure one, under the condition that the light rod two 101 provides the moving guide for the abutting disc 9, the screw rod two 10 is threadedly driven with the sealing plate 6, and one end of the screw rod two 10 is also provided with a rotating member, and the rotation of the screw rod two 10 can drive the abutting disc 9 to move and approach the position of the sealing gasket 73, so as to promote the abutting sealing of the sealing gasket 73 and the abutting disc 9.

[0035] It is worth mentioning that the movement adjustment of the extension pipe 3 and the abutting disc 9 in the straight pipe 2 is not in sequence.

Claims

1. A negative pressure valve connection elbow for a negative pressure drainage system, characterized by: The utility model provides a pipe extension device, including the elbow (1) that sets gradually from left to right, straight pipe (2) and connecting pipe (4) in proper order, be provided with extension pipe (3) in straight pipe (2), the elbow (1) is connected with the flange of straight pipe (2), extension pipe (3) and connecting pipe (4) flange connection, be provided with negative pressure valve (5) on connecting pipe (4), one end of extension pipe (3) is provided with sealing assembly (7), the outside of extension pipe (3) is provided with the abutting disc (9) for the abutting of sealing assembly (7), The straight pipe (2) flange connection has the closing plate (6) to one end of the elbow (1), the closing plate (6) is provided with drive structure one and drive structure two, drive structure one is connected with sealing assembly (7), drive structure two is connected with abutting disc (9).

2. The negative pressure valve connection elbow of a negative pressure drainage system according to claim 1, characterized in that: The sealing assembly (7) includes a fixed ring (71), the fixed ring (71) is fixedly connected to one end of the outer surface of the extension pipe (3), the ring side of the fixed ring (71) is provided with a sealing ring (72), and the end side of the fixed ring (71) is provided with a sealing gasket (73). The sealing ring (72) is slidably connected to the inner pipe wall of the straight pipe (2).

3. The negative pressure valve connection elbow of a negative pressure drainage system according to claim 2, characterized in that: The sealing gasket (73) is arranged in abutment with the abutting disc (9), the end side of the abutting disc (9) is chamfered, and the end side of the sealing gasket (73) is integrally provided with a sealing portion complementary to the chamfered structure of the abutting disc (9).

4. The negative pressure valve connection elbow of a negative pressure drainage system according to claim 3, characterized in that: The end side of the fixed ring (71) is threadedly connected to a pair of struts (11), the struts (11) movably pass through the abutting disc (9), and the sealing gasket (73) is movably inserted into the struts (11).

5. The negative pressure valve connection elbow of a negative pressure drainage system according to claim 4, characterized in that: The drive structure one includes a lead screw one (8), the lead screw one (8) is threadedly connected to the closing plate (6), one end of the lead screw one (8) is rotatably connected to one of the struts (11), and a light rod one (81) is slidably connected to the closing plate (6). One end of the light rod one (81) is fixedly connected to the other strut (11).

6. The negative pressure valve connection elbow of a negative pressure drainage system according to claim 1, characterized in that: The drive structure two includes a lead screw two (10), the lead screw two (10) is threadedly connected to the closing plate (6), one end of the lead screw two (10) is rotatably connected to the end side of the abutting disc (9), and a light rod two (101) is slidably connected to the closing plate (6). One end of the light rod two (101) is fixedly connected to the end side of the abutting disc (9).

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