Sealing structure of pressure gauge connecting pipe

Abstract

The utility model discloses a sealing structure of a pressure gauge connecting pipe, which is mounted between a joint of the pressure gauge connecting pipe and an interface of a pressure gauge, and comprises a copper gasket positioned between the joint and the interface; one of the copper gasket and the joint is provided with a positioning part, and the other one of the copper gasket and the joint is provided with a positioning groove matched with the positioning part; the positioning portion is matched with the positioning groove, the positioning and fixing effect of the copper gasket is achieved, in the installation and fixing process, the copper gasket and the connector are positioned firstly, then connection and fixing between the connector and the interface are achieved, the copper gasket cannot move in the fixing process, no gap exists after the copper gasket and the interface are attached and fixed, and leakage of a system is avoided.

Description

TECHNICAL FIELD

[0001] The utility model relates to the mould field, concretely relates to a sealing structure of pressure gauge connecting pipe. BACKGROUND

[0002] The pressure gauge connecting pipe is used for connecting the pressure gauge and the measured medium, and the pressure gauge connecting pipe has three functions: 1, transmitting pressure: the pressure gauge connecting pipe is connected as a connecting component, and the pressure gauge is connected with the measured medium, so that the pressure of the measured medium is transmitted. Through the pressure gauge reading, the pressure condition of the measured medium can be known, so that the property characteristics can be studied.

[0003] 2, protecting the pressure gauge: the pressure gauge connecting pipe can buffer the instantaneous impact of the measured medium on the pressure gauge, and the pressure gauge is protected from being damaged. Especially in the case that the medium pressure fluctuates greatly or has corrosion and high temperature, the hose can effectively isolate the medium, and the service life of the pressure gauge is prolonged.

[0004] 3, ensuring the measurement accuracy: through the buffering effect, the direct impact of the medium on the pressure gauge and the temperature influence are reduced, and the measurement accuracy is ensured. Without the buffering effect of the pressure gauge connecting pipe, the high pressure or high temperature of the medium can directly act on the pressure gauge, which can cause reading deviation or equipment damage.

[0005] In the prior art, the pressure gauge connecting pipe is connected with the pressure gauge, and the specific connection mode is that the pressure gauge is provided with a connector, one end of the pressure gauge connecting pipe is provided with a connector, and the connector and the connector are fastened by bolts or nuts. In order to increase the sealing effect between the two connection parts, a copper gasket is used to form a seal. However, in the prior art, the copper gasket cannot be effectively positioned during the fixing process of the connector, and the copper gasket will be offset. After the copper gasket is offset, the connection part will be poorly sealed, the refrigerant in the air source heat pump unit connection system will be leaked, and the fault cannot be detected during the assembly process. The fault can be detected only after the system (air source heat pump unit connection system) is filled with refrigerant and tested, which can cause waste of refrigerant and re-repair of the unit, and has adverse effects on the system (air source heat pump unit connection system). UTILITY MODEL CONTENTS

[0006] Therefore, the technical problem to be solved by the utility model is how to improve the sealing of the connection part. To this end, a sealing structure of a pressure gauge connecting pipe is installed between the connector of the pressure gauge connecting pipe and the connector of the pressure gauge, and the sealing structure comprises:

[0007] A copper gasket is located between the connector and the connector.

[0008] One of the copper gasket and the connector is provided with a positioning part, and the other of the copper gasket and the connector is provided with a positioning groove matched with the positioning part.

[0009] The positioning part is provided on the copper gasket, the positioning part is provided with a first through hole penetrating through two ends of the positioning part; the connector is provided with a channel, and the positioning groove is part of the top end of the channel.

[0010] The connector is provided with a connecting cavity in communication with the top end of the channel, the copper gasket is provided with a connecting part matched with the connecting cavity, the connecting part is connected with the positioning part, and the top end of the connecting part exceeds the top end of the connecting cavity.

[0011] The connecting cavity and the connecting part are both in a trumpet shape.

[0012] The height of the positioning part is one third to two thirds of the height of the connecting part.

[0013] The connecting part is provided with a chamfer part at the connecting position of the connecting part and the positioning part, and the chamfer part is a slope or an arc surface.

[0014] The connector is provided with a slope matched with the inner wall of the connecting part.

[0015] The copper gasket is made of red copper.

[0016] The technical scheme of the utility model has the following advantages:

[0017] 1. The sealing structure of the pressure gauge connecting pipe is characterized in that the positioning part and the positioning groove are matched to form the positioning and fixing effect of the copper gasket, the copper gasket is positioned with the connector first during the installation and fixing process, then the connection and fixing between the connector and the connector are realized, the copper gasket will not be displaced during the fixing process, the copper gasket is matched with the connector, there is no gap after fixing, and the system (air source heat pump unit connection system) has no leakage.

[0018] 2. The sealing structure of the pressure gauge connecting pipe is characterized in that the positioning part is arranged on the copper gasket, and the positioning groove is part of the top end of the channel, so that the processing difficulty and the processing cost are reduced, and the positioning and fixing effect can be realized only by adjusting the structure of the copper gasket.

[0019] 3. The sealing structure of the pressure gauge connecting pipe is characterized in that the connecting cavity and the connecting part are matched to form the effect of close matching, thereby improving the sealing effect.

[0020] 4. The sealing structure of the pressure gauge connecting pipe is characterized in that the height of the positioning part is limited, thereby further improving the positioning and fixing effect.

[0021] 5. The sealing structure of the pressure gauge connecting pipe is characterized in that the chamfer part is arranged, thereby reducing the processing difficulty.

[0022] 6. The utility model provides a kind of sealing structure of pressure gauge connecting pipe, red copper material is limited, further improve sealing effect, because the flexibility of red copper is better, improve sealing effect. BRIEF DESCRIPTION OF DRAWINGS

[0023] In order to more clearly illustrate the specific embodiments of the present utility model or the technical solutions in the prior art, the drawings needed to be used in the specific embodiments or prior art description will be briefly introduced as follows, and obviously, the drawings in the following description are some embodiments of the present utility model, and for those skilled in the art, other drawings can also be obtained without creative labor on the basis of these drawings.

[0024] Figure 1 The structure diagram of the sealing structure of the pressure gauge connecting pipe provided by the present utility model.

[0025] MARKING OF DRAWINGS:

[0026] 11, joint; 12, interface; 13, copper gasket; 14, positioning part; 15, positioning groove; 111, channel; 112, connecting cavity; 121, inclined surface; 131, connecting part; 132, concave cavity; 133, chamfered part; 141, first through hole. DETAILED DESCRIPTION

[0027] The technical solutions of the present utility model will be described clearly and completely in combination with the drawings as follows, and obviously, the described embodiments are part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments in the present utility model, all other embodiments obtained by those skilled in the art without creative labor belong to the scope of protection of the present utility model.

[0028] In the description of the present utility model, it should be pointed out that the orientation or position relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like is based on the orientation or position relationship shown in the drawings, and is only for the convenience of describing the present utility model and simplifying the description, and does not indicate or imply that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first", "second", "third" are only for the purpose of description, and cannot be understood as indicating or implying relative importance.

[0029] In the description of the utility model, it is necessary to explain, unless another explicit provision and limitation, term "installation", "link", "connection" should do broad sense understanding, for example, can be fixed connection, also can be detachable connection, or integrally connected;Can be mechanical connection, also can be electrical connection;Can be directly connected, also can be indirectly connected through intermediate medium, can be two elements inside the communication.For ordinary skilled in the art, the above terms can be understood according to the specific meaning of the utility model.

[0030] In addition, the technical features involved in different embodiments of the utility model described below can be combined with each other as long as there is no conflict.

[0031] Embodiment 1

[0032] The embodiment provides a sealing structure of pressure gauge connecting pipe, as shown in the accompanying Figure 1 It is installed between the joint 11 of the pressure gauge connecting pipe and the interface 12 of the pressure gauge, and the sealing structure comprises:

[0033] The copper gasket 13 is located between the joint 11 and the interface 12, and the copper gasket 13 plays a sealing effect here.

[0034] One of the copper gasket 13 and the joint 11 is provided with a positioning portion 14, and the other of the copper gasket 13 and the joint 11 is provided with a positioning groove 15 matched with the positioning portion 14.When the copper gasket 13 is provided with the positioning portion 14, the joint 11 is provided with the positioning groove 15;Conversely, the copper gasket 13 is provided with the positioning groove 15, and the joint 11 is provided with the positioning portion 14.Through the cooperation between the positioning portion 14 and the positioning groove 15, the positioning and fixing effect of the copper gasket 13 is formed, in the installation and fixing process, the copper gasket 13 and the joint 11 are first positioned, and then the connection and fixation between the joint 11 and the interface 12 are realized, the copper gasket 13 will not be displaced in the fixing process, the copper gasket 13 is attached to the interface 12, there is no gap after fixing, and the system (air source heat pump unit connection system) has no leakage.

[0035] Specifically, as shown in the accompanying Figure 1As shown, the positioning portion 14 is arranged on the copper gasket 13, and the positioning portion 14 is provided with a first through hole 141 penetrating through both ends of the positioning portion 14, where the both ends specifically refer to the upper and lower ends. In this embodiment, the positioning portion 14 is in a cylindrical shape, and the first through hole 141 is coaxially arranged with the positioning portion 14 and penetrates through the upper and lower ends of the positioning portion 14. The connector 11 is provided with a channel 111, and the connector 11 in the prior art is provided with the channel 111, and the positioning groove 15 is a part of the top end of the channel 111. The positioning portion 14 is arranged on the copper gasket 13, and the positioning groove 15 is a part of the top end of the channel 111, which reduces the processing difficulty and the processing cost, and only needs to adjust the structure of the copper gasket 13 to achieve the positioning and fixing effect. In addition, the copper gasket 13 can also be provided with the positioning groove 15, and the connector 11 can be provided with the positioning portion 14, which can also form the positioning and fixing effect, but the structure has the disadvantage of higher processing cost compared with the above structure.

[0036] Specifically, as shown in the accompanying drawings, Figure 1 As shown, the connector 11 is provided with a connecting cavity 112 in communication with the top end of the channel 111, and the copper gasket 13 is provided with a connecting portion 131 matched with the connecting cavity 112, and the connecting portion 131 is connected with the positioning portion 14. Here, the connecting portion 131 is provided with a concave cavity 132 matched with the interface 12, and the first through hole 141 is in communication with the concave cavity 132. When the connector 11, the interface 12 and the copper gasket 13 are matched, the outer edge wall of the connecting portion 131 abuts against the inner edge wall of the connecting cavity 112, and the inner edge wall of the concave cavity 132 abuts against the outer edge wall of the interface 12, so as to realize the sealing effect. Here, the top end of the connecting portion 131 exceeds the top end of the connecting cavity 112. The connecting cavity 112 is matched with the connecting portion 131 to form a close-fitting effect and improve the sealing effect.

[0037] Specifically, as shown in the accompanying drawings, Figure 1 As shown, the connecting cavity 112 and the connecting portion 131 are both in a trumpet shape. The trumpet-shaped arrangement can also play a guiding effect in the matching process, so that the sealing effect is better.

[0038] Specifically, as shown in the accompanying drawings, Figure 1 As shown, the height of the positioning portion 14 is one third to two thirds of the height of the connecting portion 131. The height of the positioning portion 14 is limited to further improve the positioning and fixing effect. In this embodiment, the height of the positioning portion 14 is half of the height of the connecting portion 131.

[0039] Specifically, as shown in the accompanying drawings, Figure 1 As shown, the connecting portion 131 and the positioning portion 14 are provided with a chamfer portion 133 at the connection position, which specifically refers to the connection position between the first through hole 141 and the concave cavity 132, and the chamfer portion 133 is in a slope or arc shape. The chamfer portion 133 is arranged to reduce the processing difficulty.

[0040] Specifically, as shown in the accompanying drawings,Figure 1 As shown, the interface 12 is provided with a slope 121 which is in abutment with the inner wall of the connecting portion 131. Here, the slope 121 is in abutment with the inner edge wall of the recessed cavity 132.

[0041] Specifically, the copper gasket 13 is made of red copper material. The limitation of red copper material further improves the sealing effect, because the red copper has better flexibility, which improves the sealing effect.

[0042] Obviously, the above embodiments are only examples for clearly illustrating, but not limitation to the embodiments. For those skilled in the art, other different forms of changes or variations can be made on the basis of the above description. Here, it is not necessary and also impossible to enumerate all the embodiments. The obvious changes or variations derived therefrom are still within the protection scope of the present application.

Claims

1. A seal structure of a pressure gauge connection pipe which is installed between a joint (11) of a pressure gauge connection pipe and an interface (12) of a pressure gauge, characterized by, The sealing structure comprises: A copper gasket (13) is arranged between the joint (11) and the interface (12); One of the copper gasket (13) and the joint (11) is provided with a positioning part (14), and the other is provided with a positioning groove (15) matched with the positioning part (14).

2. The seal structure for a pressure gauge connection pipe according to claim 1, characterized by The positioning part (14) is arranged on the copper gasket (13), and the positioning part (14) is provided with a first through hole (141) penetrating through both ends of the positioning part (14); the joint (11) is provided with a channel (111), and the positioning groove (15) is part of the top end of the channel (111).

3. The seal for a pressure gauge connection tube according to claim 2, wherein The joint (11) is provided with a connecting cavity (112) in communication with the top end of the channel (111), and the copper gasket (13) is provided with a connecting part (131) matched with the connecting cavity (112), the connecting part (131) is connected with the positioning part (14), and the top end of the connecting part (131) exceeds the top end of the connecting cavity (112).

4. The seal for a pressure gauge connection tube according to claim 3, wherein The connecting cavity (112) and the connecting part (131) are both in the shape of a horn.

5. The seal structure for a pressure gauge connection pipe according to claim 3 or 4, characterized in that, The height of the positioning part (14) is one third to two thirds of the height of the connecting part (131).

6. The seal structure for a pressure gauge connection pipe according to claim 3 or 4, characterized in that, The connecting part (131) and the positioning part (14) are provided with a chamfer part (133) at the connection, and the chamfer part (133) is a bevel (121) or an arc surface.

7. The seal structure for a pressure gauge connection pipe according to claim 3 or 4, characterized in that, The interface (12) is provided with a bevel (121) matched with the inner wall of the connecting part (131).

8. The seal for a pressure gauge connection tube according to claim 1, wherein The copper gasket (13) is made of red copper.

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