A quick connection type leak-proof pressure tapping joint structure differential pressure gauge

Abstract

The utility model relates to differential pressure gauge technical field, concretely is a kind of quick connection type leakproof pressure tapping joint structure differential pressure gauge, including differential pressure gauge reading surface, differential pressure gauge shell, the differential pressure gauge reading surface with the differential pressure gauge shell fixed sealing connection, the differential pressure gauge shell rear end surface is provided with positive pressure port and negative pressure port, the differential pressure gauge shell side is provided with positive pressure tapping port and negative pressure tapping port, the positive pressure tapping port with the positive pressure port inside through, the negative pressure tapping port with the negative pressure port inside through, the positive pressure tapping port with the negative pressure tapping port inside are provided with pressure tapping joint, two the pressure tapping joint middle part is respectively with the positive pressure port with the negative pressure port inside through, the pressure tapping joint inside is inserted with sealing ring. The utility model, by sealing ring design is relatively soft non-metallic material, boss to increase strength, stop core is primary sealing body, circular ring is secondary sealing body, cover face and shell differential pressure gauge shell are third sealing, form the effect of multistage sealing.

Description

Technical Field

[0001] This utility model relates to the field of differential pressure gauge technology, specifically a differential pressure gauge with a quick-connect leak-proof pressure tapping connector structure. Background Technology

[0002] In the field of central air conditioning, pointer-type micro differential pressure gauges are generally used to measure air pressure difference. Traditional pointer-type micro differential pressure gauges are mostly made of cast aluminum housing, with threads machined at the pressure measuring interface, and are tightened and fixed to the differential pressure gauge body with copper pagoda-shaped connector fittings. The raw material cost is high, and the processing technology is cumbersome. In addition, if the thread connection is not in place, the measurement will be inaccurate, affecting the performance.

[0003] Therefore, a quick-connect leak-proof pressure tapping connector structure differential pressure gauge is proposed to solve the problems mentioned above. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model provides a quick-connect leak-proof pressure tapping differential gauge, which offers advantages such as low cost, simple structure, and convenient installation.

[0005] To achieve the above objectives, this utility model provides the following technical solution: it includes a differential pressure gauge reading surface and a differential pressure gauge housing, wherein the differential pressure gauge reading surface is fixedly and sealed to the differential pressure gauge housing, a positive pressure port and a negative pressure port are provided on the rear end face of the differential pressure gauge housing, and a positive pressure tapping port and a negative pressure tapping port are provided on the side of the differential pressure gauge housing, wherein the positive pressure tapping port and the positive pressure port are internally connected, and the negative pressure tapping port and the negative pressure port are internally connected; Both the positive pressure tap and the negative pressure tap are provided with pressure tapping connectors, and the middle portions of the two pressure tapping connectors are respectively connected to the interior of the positive pressure tap and the negative pressure tap; The pressure tapping connector has a sealing ring inserted inside, which is composed of a boss, a ring, a plug, and a sealing surface.

[0006] Preferably, the pressure tapping connector is conical, and a certain space is provided between the pressure tapping connector and the arc-shaped inner wall of the negative pressure tapping port.

[0007] Preferably, the outer edges of the positive pressure tap and the negative pressure tap are arc surfaces, and a sealing platform is provided on the outer edges of both the positive pressure tap and the negative pressure tap, with the sealing ring in close contact with the sealing platform.

[0008] Preferably, the boss is fixedly disposed on the middle of the outer side of the sealing surface, the ring and the plug are fixedly disposed on the inner side of the sealing surface, and the plug is located in the middle of the ring.

[0009] Preferably, the differential pressure gauge housing is provided with the pressure tapping connector and the inner wall of the negative pressure tapping port on one side, the plug is inserted into the middle of the pressure tapping connector, and the sealing surface is located inside the sealing platform.

[0010] Preferably, the differential pressure gauge reading surface is made of engineering plastic, and the differential pressure gauge housing is made of non-metallic material.

[0011] Compared with the prior art, this utility model provides a quick-connect leak-proof pressure tapping differential gauge with the following advantages: 1. By designing the sealing ring as a relatively soft non-metallic material, the boss is used to increase strength, the plug core is the primary sealing body, the ring is the secondary sealing body, and the sealing surface and the differential pressure gauge housing are the tertiary sealing body, a multi-stage sealing effect is formed.

[0012] 2. Through the sequential insertion of the boss, ring, plug, and cover surface with the pressure tapping connector and differential pressure gauge housing, multiple sealing connections are formed. Guided by the pressure tapping connector, the sealing ring can quickly and accurately prevent leakage by inserting and sealing the positive and negative pressure tapping ports, thereby improving the stability and safety of the device during use.

[0013] 3. By designing the pressure tapping connector as a cone shape, when an external pressure measuring air tube is connected, the tapered design can achieve a tight fit between the pressure tapping connector and the pressure measuring air tube, preventing air pressure leakage. Attached Figure Description

[0014] Figure 1 This is a front view structural diagram of the present invention; Figure 2 This is a side view of the structure of this utility model; Figure 3 This is a schematic diagram of the rear view structure of this utility model; Figure 4 This is a cross-sectional structural diagram of the present invention; Figure 5 This is a front view structural diagram of the sealing ring of this utility model; Figure 6 This is a side sectional view of the sealing ring structure of this utility model.

[0015] In the figure: 1. Differential pressure gauge reading surface; 2. Differential pressure gauge housing; 3. Positive pressure tap; 31. Positive pressure port; 4. Pressure tap connector; 5. Negative pressure tap; 51. Negative pressure port; 6. Sealing ring; 61. Boss; 62. Ring; 63. Plug; 64. Cover surface; 7. Cover platform. Detailed Implementation

[0016] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model. Example

[0017] Please see Figure 1 - Figure 4 The differential pressure gauge with a quick-connect leak-proof pressure tapping joint structure in this embodiment includes a differential pressure gauge reading surface 1 and a differential pressure gauge housing 2. The differential pressure gauge reading surface 1 and the differential pressure gauge housing 2 are fixedly and sealed together. A positive pressure port 31 and a negative pressure port 51 are provided on the rear end face of the differential pressure gauge housing 2. A positive pressure tapping port 3 and a negative pressure tapping port 5 are provided on the side of the differential pressure gauge housing 2. The positive pressure tapping port 3 and the positive pressure port 31 are internally connected, and the negative pressure tapping port 5 and the negative pressure port 51 are internally connected. Both the positive pressure tap 3 and the negative pressure tap 5 are equipped with pressure tapping connectors 4, and the middle parts of the two pressure tapping connectors 4 are respectively connected to the interior of the positive pressure port 31 and the negative pressure port 51. The pressure tapping connector 4 has a sealing ring 6 inserted inside. The sealing ring 6 is composed of a boss 61, a ring 62, a plug core 63, and a sealing surface 64. With the combined use of the differential pressure gauge reading surface 1, differential pressure gauge housing 2, positive pressure tap 3, negative pressure tap 5, positive pressure port 31, and negative pressure port 51, and with the support of its existing internal structure, the device has complete functionality. The fixed sealing connection between the differential pressure gauge reading surface 1 and the differential pressure gauge housing 2 is a well-known technique in this field, and therefore has not been described in detail. Thus, with the pressure tapping connector 4 and the sealing ring 6 inserted together, and simultaneously with the boss 61, the ring 62, the plug 63, the cover surface 64 and the pressure tapping connector 4 and the differential pressure gauge housing 2 being inserted in sequence, multiple sealing connections are formed. Under the guidance of the pressure tapping connector 4, the sealing ring 6 can quickly and accurately seal the positive pressure tapping port 3 and the negative pressure tapping port 5 to prevent leakage, thereby improving the stability and safety of the device during use.

[0018] Please see Figure 4 - Figure 6 The pressure tapping connector 4 is conical, and there is a certain space between the pressure tapping connector 4 and the arc-shaped inner wall of the negative pressure tapping port 5. The outer edges of the positive pressure tap 3 and the negative pressure tap 5 are arc surfaces. Both the positive pressure tap 3 and the negative pressure tap 5 are provided with a sealing platform 7, and the sealing ring 6 is in close contact with the sealing platform 7. The boss 61 is fixedly disposed in the middle of the outer side of the cover surface 64, and the ring 62 and the plug 63 are fixedly disposed in the inner side of the cover surface 64, with the plug 63 located in the middle of the ring 62; The differential pressure gauge housing 2 is inserted between the pressure tapping connector 4 and the inner wall of the negative pressure tapping port 5, the plug 63 is inserted into the middle of the pressure tapping connector 4, and the sealing surface 64 is located inside the sealing platform 7. By designing the pressure tapping connector 4 as a cone shape, when an external pressure measuring air tube is connected, the tapered design can achieve a tight fit between the pressure tapping connector and the pressure measuring air tube, preventing air pressure leakage. By designing the sealing ring 6 as a softer non-metallic material, the boss 61 is used to increase strength, the plug core 63 is a primary sealing body, the ring 62 is a secondary sealing body, and the sealing surface 64 and the housing differential pressure gauge housing 2 form a tertiary seal, thus creating a multi-stage sealing effect. And make the sealing surface 64 fit tightly against the sealing platform 7, so that the sealing ring 6 can fit tightly against the differential pressure gauge housing 2 to achieve a high airtightness effect; "+" and "-" symbols are provided on both the negative pressure tap 5 and the sealing ring 6 to ensure that customers can connect the pipes correctly.

[0019] Please see Figure 1 The differential pressure gauge reading surface 1 is made of engineering plastic (commonly PC material), and the differential pressure gauge housing 2 will also be made of engineering plastic; The manufacturing of the differential pressure gauge reading surface 1 and the differential pressure gauge housing 2 are both existing technologies. Their specific materials and connection methods are used in actual technology, so they will not be described in detail here.

[0020] The installation, connection, or setting methods disclosed in this embodiment are all common mechanical connection methods. As long as they can achieve their beneficial effects, they can be implemented. Therefore, this embodiment will not elaborate on their specific structural composition and working principle.

[0021] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A quick-connect leak-proof pressure tapping differential pressure gauge, characterized in that: The device includes a differential pressure gauge reading surface (1) and a differential pressure gauge housing (2). The differential pressure gauge reading surface (1) is fixedly and sealed to the differential pressure gauge housing (2). The rear end face of the differential pressure gauge housing (2) is provided with a positive pressure port (31) and a negative pressure port (51). The side of the differential pressure gauge housing (2) is provided with a positive pressure tap (3) and a negative pressure tap (5). The positive pressure tap (3) and the positive pressure port (31) are internally connected, and the negative pressure tap (5) and the negative pressure port (51) are internally connected. Both the positive pressure port (3) and the negative pressure port (5) are provided with pressure tapping connectors (4), and the middle parts of the two pressure tapping connectors (4) are respectively connected to the interior of the positive pressure port (31) and the negative pressure port (51); The pressure tapping connector (4) has a sealing ring (6) inserted inside. The sealing ring (6) is composed of a boss (61), a ring (62), a plug (63), and a sealing surface (64).

2. The quick-connect leak-proof pressure tapping differential gauge according to claim 1, characterized in that: The pressure tapping connector (4) is conical, and there is a certain space between the pressure tapping connector (4) and the arc-shaped inner wall of the negative pressure tapping port (5).

3. The quick-connect leak-proof pressure tapping differential gauge according to claim 1, characterized in that: The outer edges of the positive pressure tap (3) and the negative pressure tap (5) are arc surfaces. Both the positive pressure tap (3) and the negative pressure tap (5) are provided with a sealing platform (7). The sealing ring (6) is in close contact with the sealing platform (7).

4. A quick-connect leak-proof pressure tapping differential gauge according to claim 3, characterized in that: The boss (61) is fixedly disposed in the middle of the outer side of the cover surface (64), the ring (62) and the plug (63) are fixedly disposed in the inner side of the cover surface (64), and the plug (63) is located in the middle of the ring (62).

5. A quick-connect leak-proof pressure tapping differential gauge according to claim 4, characterized in that: The differential pressure gauge housing (2) is provided with the pressure tapping connector (4) and the negative pressure tapping port (5) on one side. The plug (63) is inserted into the middle of the pressure tapping connector (4), and the sealing surface (64) is located inside the sealing platform (7).

6. A quick-connect leak-proof pressure tapping differential gauge according to claim 1, characterized in that: The differential pressure gauge reading surface (1) is made of engineering plastic, and the differential pressure gauge housing (2) is made of non-metallic material.

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