Pressure gauge connector, in-situ pressure gauge and absorption type lithium bromide unit

Abstract

The embodiment of the utility model discloses a pressure gauge connector, an in-situ pressure gauge and an absorption type lithium bromide unit, and aims to solve the problem that the existing pressure gauge connector usually adopts a rubber pipe to connect the in-situ pressure gauge and a vacuum environment in the unit, and the rubber pipe is easy to age, damage and form a leakage point along with use, so that the vacuum environment in the unit is influenced. According to the technical scheme, the first connecting piece is integrally formed, leakage points caused by improper welding can be avoided, the through hole in the first connecting piece can replace a channel formed by the rubber pipe, the first connecting piece is made of a rigid material, and the first connecting piece is made of a rigid material. Meanwhile, according to the technical scheme, the on-site pressure gauge is connected through the pressure gauge locking nut, the on-site pressure gauge is connected with the unit through the second flange, and stable connection of the on-site pressure gauge and the unit is achieved.

Description

Technical Field

[0001] The embodiments of the present application relate to the technical field of thermal power generation equipment, and in particular to a pressure gauge connector, an on-site pressure gauge, and an absorption lithium bromide unit. Background Art

[0002] With the increasing popularity of trigeneration of cooling, heating and power in thermal power plants, the number of absorption lithium bromide refrigeration units and heat pump units (hereinafter referred to as units) put into operation is also increasing, and the maintenance work that comes with it is also increasing. The unit is in high vacuum conditions, and the pressure values ​​of most units will be maintained in the range of 100Pa to 500Pa. During the maintenance, maintenance and overhaul of the unit, it is necessary to monitor the vacuum condition in the unit at any time. The conventional monitoring methods are pressure sensors and local pressure gauges. However, since the existing local pressure gauges are usually connected to the unit with rubber tubes, it is easy to form leakage points. Most manufacturers only install one pressure sensor, but this design method also brings a lot of inconvenience to maintenance and overhaul work, such as: the pressure sensor cannot be regularly disassembled, inspected, replaced, and calibrated online, it is impossible to determine whether the pressure sensor is accurate, it is impossible to check the pressure inside the unit when the unit is filled with nitrogen and positive pressure, and it is impossible to detect the limit pressure of the vacuum system. Utility Model Content

[0003] The utility model aims to solve at least one of the technical problems existing in the prior art or related technology.

[0004] To this end, a first aspect of the utility model provides a pressure gauge connector.

[0005] A second aspect of the utility model provides an on-site pressure gauge.

[0006] The third aspect of the utility model provides an absorption lithium bromide unit.

[0007] In view of this, according to a first aspect of an embodiment of the present application, a pressure gauge connector is provided, comprising:

[0008] A first connecting member, one end of which is connected to an on-site pressure gauge, the first connecting member comprises a connecting head, the connecting head is annular, one side of the connecting head is fixedly connected to a hollow rod, the other end of the hollow rod is fixedly connected to a first flange, the connecting head, the hollow rod and the first flange are coaxially arranged, and the on-site pressure gauge is arranged on a side of the first connecting member where the connecting head is arranged;

[0009] A pressure gauge lock nut, the pressure gauge lock nut is sleeved and connected to the hollow rod of the first connecting piece, a thread is provided on the inner side of the pressure gauge lock nut, and the pressure gauge lock nut is threadedly connected to the local pressure gauge;

[0010] The second flange is connected to the first flange, and the pressure gauge connector is connected to an external unit through the second flange.

[0011] In a feasible implementation, it also includes:

[0012] A polytetrafluoroethylene pad is provided between the local pressure gauge and the connecting head.

[0013] In a feasible implementation, it also includes:

[0014] An annular component is arranged in a groove between the first flange and the second flange.

[0015] In a feasible implementation manner, the annular component includes:

[0016] An annular rubber ring is arranged in a groove between the first flange and the second flange.

[0017] The bracket is sleeve-connected to the annular rubber ring.

[0018] In a feasible implementation, it also includes:

[0019] A flange clamp, the first flange and the second flange are connected through the flange clamp, and the flange clamp includes two hingedly connected semi-annular clamps, and the two semi-annular clamps are sleeve-connected to the flanges of the first flange and the second flange.

[0020] In a feasible implementation manner, the flange clamp further includes:

[0021] A dovetail screw is used to fasten the non-hinged ends of the two semi-annular clamps together.

[0022] In a feasible implementation manner, the semi-annular clamp is provided with a groove, and the groove cooperates with the flanges of the first flange and the second flange, and a rubber pad is provided inside the groove of the semi-annular clamp.

[0023] In a feasible implementation, it also includes:

[0024] The alarm component is used to read the indication of the local pressure gauge. When the local pressure gauge indication exceeds a threshold value, the alarm component issues an alarm.

[0025] According to a second aspect of an embodiment of the present application, an on-site pressure gauge is provided, comprising:

[0026] A pressure gauge body, which is used to measure air pressure and display the value;

[0027] A threaded connection pipe, the threaded connection pipe is connected to the pressure gauge body, and one end of the threaded connection pipe away from the pressure gauge body is provided with an external thread;

[0028] Any of the above-mentioned pressure gauge connectors, wherein the pressure gauge connector is threadedly connected to the threaded connecting pipe via a pressure gauge lock nut.

[0029] According to a third aspect of an embodiment of the present application, an on-site pressure gauge is provided, comprising:

[0030] Refrigeration units;

[0031] Heat pump units;

[0032] As mentioned above, the local pressure gauge is connected to the refrigeration unit and / or the heat pump unit, and is used to measure the internal air pressure.

[0033] Compared with the prior art, the utility model includes at least the following beneficial effects: the pressure gauge connector provided in the embodiment of the present application includes a first connecting piece, a pressure gauge lock nut and a second flange.

[0034] Among them, the first connecting member includes a connecting head, a hollow rod and a first flange, the connecting head and the first flange are respectively arranged at both ends of the hollow rod, the connecting head, the hollow rod and the first flange are coaxially arranged, so that a through hole for gas to pass through is left in the center of the first connecting member.

[0035] At present, the existing pressure gauge joints usually use rubber tubes to connect the local pressure gauge and the vacuum environment inside the unit. With use, the rubber tubes are prone to aging and damage, forming leakage points, which affect the vacuum environment inside the unit. The rubber tubes can only be replaced regularly or the local pressure gauges can be cancelled. Both will affect the production process to varying degrees. In the present technical solution, the first connecting piece is integrally formed to avoid leakage points caused by improper welding. Its internal through hole can replace the passage formed by the rubber tube, and the first connecting piece is made of rigid material. Its life and stability are much greater than those of the rubber tube, which can avoid frequent replacement and maintenance. At the same time, the technical solution connects the local pressure gauge through the pressure gauge lock nut and connects the unit through the second flange, thereby realizing a stable connection between the local pressure gauge and the unit.

[0036] This technical solution improves the stability and life of the pressure gauge joint without having to cancel the on-site pressure gauge, and effectively reduces the leakage of the vacuum environment inside the unit. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Various other advantages and benefits will become apparent to those of ordinary skill in the art by reading the detailed description of the preferred embodiments below. The accompanying drawings are only for the purpose of illustrating the preferred embodiments and are not to be considered as limiting the present application. Also, the same reference symbols are used throughout the accompanying drawings to represent the same components. In the accompanying drawings:

[0038] Figure 1 A structural block diagram of a first connecting piece, a pressure gauge lock nut and a polytetrafluoroethylene pad in an embodiment provided by the present application;

[0039] Figure 2 A structural block diagram of a second flange, an annular assembly and a flange clamp according to an embodiment of the present application;

[0040] Figure 3 A structural block diagram of a second flange and annular assembly according to an embodiment of the present application.

[0041] in, Figure 1-3 The corresponding relationship between the reference numerals and the component names is as follows:

[0042] 110, first connecting piece; 120, pressure gauge lock nut; 130, second flange; 140, PTFE pad; 150, annular assembly; 160, flange clamp;

[0043] 111. Connector; 112. Hollow rod; 113. First flange;

[0044] 151. annular rubber ring; 152. bracket. DETAILED DESCRIPTION

[0045] In order to better understand the above-mentioned technical scheme, the technical scheme of the embodiments of the present application is described in detail below through the accompanying drawings and specific embodiments. It should be understood that the embodiments of the present application and the specific features in the embodiments are detailed descriptions of the technical scheme of the embodiments of the present application, rather than limitations on the technical scheme of the present application. In the absence of conflict, the embodiments of the present application and the technical features in the embodiments may be combined with each other.

[0046] like Figure 1-3As shown, according to the first aspect of the embodiment of the present application, a pressure gauge joint is proposed, including: a first connecting member 110, one end of the first connecting member 110 is connected to an on-site pressure gauge, the first connecting member 110 includes a connecting head 111, the connecting head 111 is annular, one side of the connecting head 111 is fixedly connected to a hollow rod 112, the other end of the hollow rod 112 is fixedly connected to a first flange 113, the connecting head 111, the hollow rod 112 and the first flange 113 are coaxially arranged, and the on-site pressure gauge is arranged on the side of the first connecting member 110 where the connecting head 111 is provided; a pressure gauge lock nut 120, the pressure gauge lock nut 120 is sleeved and connected to the hollow rod 112 of the first connecting member 110, the inner side of the pressure gauge lock nut 120 is provided with a thread, and the pressure gauge lock nut 120 is threadedly connected to the on-site pressure gauge; a second flange 130, the second flange 130 is connected to the first flange 113, and the pressure gauge joint is connected to an external unit through the second flange 130.

[0047] The pressure gauge connector provided in the embodiment of the present application includes a first connecting member 110 , a pressure gauge lock nut 120 and a second flange 130 .

[0048] Among them, the first connecting member 110 includes a connecting head 111, a hollow rod 112 and a first flange 113. The connecting head 111 and the first flange 113 are respectively arranged at both ends of the hollow rod 112. The connecting head 111, the hollow rod 112 and the first flange 113 are coaxially arranged so that a through hole is left in the center of the first connecting member 110 for gas to pass through.

[0049] The pressure gauge lock nut 120 is sleeve-connected to the first connecting piece 110 , and the pressure gauge lock nut 120 is provided with an internal thread for connecting to an on-site pressure gauge. The pressure gauge connector is connected to the on-site pressure gauge through the pressure gauge lock nut 120 .

[0050] One side of the second flange 130 is connected to the first flange 113 , and the other side of the second flange 130 is connected to an external unit component. The pressure gauge connector is connected to the external unit component through the first flange 113 and the second flange 130 .

[0051] During use, the local pressure gauge is sleeved and connected to one end of the first connecting piece 110 provided with a connecting head 111, the detection end of the local pressure gauge is connected to the through hole inside the first connecting piece 110, and the local pressure gauge is threadedly connected to the pressure gauge lock nut 120, thereby realizing the fixation between the local pressure gauge and the first connecting piece 110, and the first flange 113 is connected to the second flange 130, thereby realizing the connection between the local pressure gauge and the remaining components of the unit.

[0052] At present, the existing pressure gauge joints usually use rubber tubes to connect the local pressure gauge and the vacuum environment inside the unit. With use, the rubber tubes are prone to aging and damage, forming leakage points, affecting the vacuum environment inside the unit. The rubber tubes can only be replaced regularly or the local pressure gauges can be cancelled, both of which will affect the production process to varying degrees. In the present technical solution, the first connecting piece 110 is integrally formed to avoid leakage points caused by improper welding. Its internal through holes can replace the passage formed by the rubber tube, and the first connecting piece 110 is made of rigid material. Its life and stability are much greater than those of rubber tubes, which can avoid frequent replacement and maintenance. At the same time, the technical solution connects the local pressure gauge through the pressure gauge lock nut 120 and connects the unit through the second flange 130, thereby realizing a stable connection between the local pressure gauge and the unit.

[0053] This technical solution improves the stability and life of the pressure gauge joint without having to cancel the on-site pressure gauge, and effectively reduces the leakage of the vacuum environment inside the unit.

[0054] like Figure 1-3 As shown, it also includes: a polytetrafluoroethylene pad 140, and the polytetrafluoroethylene pad 140 is arranged between the local pressure gauge and the connecting head 111.

[0055] In this technical solution, a polytetrafluoroethylene pad 140 is provided between the local pressure gauge and the connecting head 111. The polytetrafluoroethylene pad 140 is in the shape of a ring pad. When the local pressure gauge is threadedly connected to the pressure gauge lock nut 120, there is a contact surface between the local pressure gauge and the connecting head 111. The polytetrafluoroethylene pad 140 is arranged on the contact surface to avoid gas leakage between the two rigid contact surfaces, thereby further improving the sealing performance of the pressure gauge joint.

[0056] like Figure 1-3 As shown, it also includes: an annular component 150, and the annular component 150 is arranged in the groove between the first flange 113 and the second flange 130.

[0057] This technical solution also includes an annular component 150 arranged in the groove between the first flange 113 and the second flange 130. The contact surfaces of the first flange 113 and the second flange 130 are also two rigid surfaces in contact. Due to reasons such as part tolerance, there is a risk of leakage at the contact surface of the first flange 113 and the second flange 130. Therefore, an annular component 150 is added, and a groove is opened on the contact surface of the first flange 113 and the second flange 130, and the annular component 150 is arranged inside the groove. It can be understood that the annular component 150 is made of flexible material, which can effectively prevent leakage from the two contact surfaces. This technical solution improves the sealing of the pressure gauge joint.

[0058] like Figure 1-3As shown, the annular component 150 includes: an annular rubber ring 151 , which is disposed in a groove between the first flange 113 and the second flange 130 ; and a bracket 152 , to which the annular rubber ring 151 is sleeve-connected.

[0059] like Figure 1-3 As shown, it also includes: a flange clamp 160, the first flange 113 and the second flange 130 are connected through the flange clamp 160, and the flange clamp 160 includes two hinged semi-annular clamps, and the two semi-annular clamps are sleeved and connected to the flanges of the first flange 113 and the second flange 130.

[0060] In this technical solution, the flange clamp 160 is composed of two semi-annular clamps, which are sleeved and connected to the flanges of the first flange 113 and the second flange 130. At the same time, the non-hinged ends of the two semi-annular clamps are buckled to achieve fixation between the first flange 113 and the second flange 130.

[0061] like Figure 1-3 As shown, the flange clamp 160 further includes: a dovetail screw, and the non-hinged ends of the two semi-annular clamps are fastened together by the dovetail screw.

[0062] In this technical solution, the non-hinged ends of the two semi-annular clamps are fixed with dovetail screws. The dovetail screws have the advantage of being easy to lock and disassemble, making it convenient for subsequent staff to inspect and repair the on-site pressure gauge.

[0063] like Figure 1-3 As shown, the semi-annular clamp is provided with a groove, which cooperates with the flanges of the first flange 113 and the second flange 130, and a rubber pad is provided inside the groove of the semi-annular clamp.

[0064] In this technical solution, a groove is provided on the side of the semi-annular clamp that contacts the first flange 113 and the second flange 130, and the flanges of the first flange 113 and the first flange 113 are inserted into the groove, thereby realizing the fixation of the semi-annular clamp to the first flange 113 and the second flange 130. At the same time, a rubber bump is provided on the inner side of the flange, specifically, rubber pads are provided on the upper and lower sides of the groove, thereby further strengthening the fastening effect on the first flange 113 and the second flange 130.

[0065] like Figure 1-3 As shown, it also includes: an alarm component, which is used to read the indication of the local pressure gauge. When the local pressure indication exceeds a threshold, the alarm component issues an alarm.

[0066] In this technical solution, the pressure gauge connector also includes an alarm component, which reads the indication of the local pressure gauge. When the pressure indication is lower than the threshold, the alarm sounds an alarm, which can effectively improve the response speed of the staff when a leak occurs inside the unit. It can be understood that the alarm component is provided with a switch, and when the unit is being inspected and repaired, the alarm component can be closed in advance to avoid false alarms.

[0067] like Figure 1-3 As shown, according to the second aspect of the embodiment of the present application, an on-site pressure gauge is proposed, comprising: a pressure gauge body, the pressure gauge body is used to measure air pressure and display the reading; a threaded connecting pipe, the threaded connecting pipe is connected to the pressure gauge body, and the end of the threaded connecting pipe away from the pressure gauge body is provided with an external thread; a pressure gauge connector as any of the above items, the pressure gauge connector is threadedly connected to the threaded connecting pipe through a pressure gauge lock nut 120.

[0068] The on-site pressure gauge provided in the embodiment of the present application comprises a pressure gauge body, a threaded connecting pipe and a pressure gauge joint as described above, wherein the threaded connecting pipe is arranged on the pressure gauge body, and the threaded connecting pipe is connected to the pressure gauge lock nut 120 of the pressure gauge joint through an external thread. It can be understood that the threaded connecting pipe and the pressure gauge joint are jointly formed with a through hole, and the detection end of the pressure gauge body is connected to the through hole;

[0069] The application of the local pressure gauge can effectively reduce the risk of leakage points being formed in the local pressure gauge and improve the stability of the local pressure gauge.

[0070] like Figure 1-3 As shown, according to the third aspect of the embodiment of the present application, an absorption lithium bromide unit is proposed, including: a refrigeration unit; a heat pump unit; an on-site pressure gauge such as the above-mentioned, the on-site pressure gauge is connected to the refrigeration unit, and / or, the heat pump unit, and the on-site pressure gauge is used to measure the internal air pressure.

[0071] Absorption lithium bromide refrigeration units and heat pump units are in high vacuum conditions internally, and the pressure values ​​of most units are maintained within the range of 100Pa to 500Pa. The on-site pressure gauge provided by this technical solution can effectively reduce the maintenance work caused by internal pressure leakage.

[0072] In the present invention, the terms "first", "second", and "third" are used for descriptive purposes only and should not be understood as indicating or implying relative importance; the term "plurality" refers to two or more, unless otherwise clearly defined. The terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; "connected" can be a direct connection or an indirect connection through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

[0073] In the description of the present invention, it is necessary to understand that the directions or positional relationships indicated by terms such as "up", "down", "left", "right", "front" and "back" are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or unit referred to must have a specific direction, be constructed and operated in a specific orientation, and therefore, cannot be understood as a limitation on the present invention.

[0074] In the description of this specification, the description of the terms "one embodiment", "some embodiments", "specific embodiments", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0075] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may be subject to various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A pressure gauge connector, characterized in that: include: A first connecting member, one end of which is connected to an on-site pressure gauge, the first connecting member comprises a connecting head, the connecting head is annular, one side of the connecting head is fixedly connected to a hollow rod, the other end of the hollow rod is fixedly connected to a first flange, the connecting head, the hollow rod and the first flange are coaxially arranged, and the on-site pressure gauge is arranged on a side of the first connecting member where the connecting head is arranged; A pressure gauge lock nut, the pressure gauge lock nut is sleeved and connected to the hollow rod of the first connecting piece, a thread is provided on the inner side of the pressure gauge lock nut, and the pressure gauge lock nut is threadedly connected to the local pressure gauge; The second flange is connected to the first flange, and the pressure gauge connector is connected to an external unit through the second flange.

2. The pressure gauge connector according to claim 1, characterized in that: Also includes: A polytetrafluoroethylene pad is provided between the local pressure gauge and the connecting head.

3. The pressure gauge connector according to claim 1, characterized in that: Also includes: An annular component is arranged in a groove between the first flange and the second flange.

4. The pressure gauge connector according to claim 3, characterized in that: The annular assembly comprises: an annular rubber ring, the annular rubber ring being arranged in a groove between the first flange and the second flange; The bracket is sleeve-connected to the annular rubber ring.

5. The pressure gauge connector according to claim 1, characterized in that: Also includes: A flange clamp, the first flange and the second flange are connected through the flange clamp, and the flange clamp includes two hingedly connected semi-annular clamps, and the two semi-annular clamps are sleeve-connected to the flanges of the first flange and the second flange.

6. The pressure gauge connector according to claim 5, characterized in that: The flange clamp also includes: A dovetail screw is used to fasten the non-hinged ends of the two semi-annular clamps together.

7. The pressure gauge connector according to claim 5, characterized in that: The semi-annular clamp is provided with a groove, and the groove matches with the flanges of the first flange and the second flange. A rubber pad is provided inside the groove of the semi-annular clamp.

8. The pressure gauge connector according to claim 1, characterized in that: Also includes: The alarm component is used to read the indication of the local pressure gauge. When the local pressure gauge indication exceeds a threshold value, the alarm component issues an alarm.

9. An on-site pressure gauge, characterized in that: include: A pressure gauge body, the pressure gauge body is used to measure air pressure and display the value; A threaded connection pipe, the threaded connection pipe is connected to the pressure gauge body, and one end of the threaded connection pipe away from the pressure gauge body is provided with an external thread; The pressure gauge joint according to any one of claims 1 to 8, wherein the pressure gauge joint is threadedly connected to the threaded connecting pipe via a pressure gauge lock nut.

10. An absorption lithium bromide unit, characterized in that: include: Refrigeration units; Heat pump units; The local pressure gauge as described in claim 9, wherein the local pressure gauge is connected to the refrigeration unit and / or the heat pump unit, and the local pressure gauge is used to measure the internal air pressure.

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