A micro differential pressure gauge

Abstract

The utility model discloses a kind of micro differential pressure tables, belong to micro differential pressure table technical field.The utility model includes bottom shell, two positive pressure air inlet holes and two negative pressure air inlet holes are opened on bottom shell, and one positive pressure air inlet hole is detachably connected with plug or is equipped with plugging plate, and another positive pressure air inlet hole is installed with air nozzle;One negative pressure air inlet hole is detachably connected with plug or is equipped with plugging plate, and another negative pressure air inlet hole is installed with air nozzle;Bottom shell is PC+GF engineering plastic shell.The utility model passes through the bottom shell with four interfaces of engineering plastic injection molding, while guaranteeing structural strength, user can block each 1 high-low pressure air hole as needed, then another each 1 high-low pressure air nozzle is connected to use.

Description

Technical Field

[0001] This utility model belongs to the technical field of micro differential pressure gauges, and in particular relates to a micro differential pressure gauge. Background Technology

[0002] The micro-pressure gauge operates on the principle of elastic deformation of a corrugated diaphragm under the pressure of the measured medium. This deformation is transmitted and amplified through a gear transmission mechanism, and the measured value is ultimately indicated on the dial by a pointer fixed to the gear shaft. Utility Model Content

[0003] The purpose of this utility model is to provide a micro differential pressure gauge, which uses an engineering plastic injection molded bottom shell with four interfaces. While ensuring structural strength, users can block one high-pressure and one low-pressure air hole as needed, and then install another high-pressure and one low-pressure air nozzle for use.

[0004] This utility model is achieved through the following technical solution:

[0005] This utility model relates to a micro differential pressure gauge, comprising a base shell with two positive pressure air inlets and two negative pressure air inlets.

[0006] One positive pressure air inlet has a detachable connecting plug or a sealing plate, and the other positive pressure air inlet is equipped with an air nozzle.

[0007] One negative pressure air inlet has a detachable connecting plug or a sealing plate, and the other negative pressure air inlet is equipped with an air nozzle.

[0008] The bottom shell is made of PC+GF engineering plastic.

[0009] Furthermore, both the positive pressure air inlet and the negative pressure air inlet include stepped holes. The stepped surface of the stepped hole has a groove, and the fine hole of the stepped hole is a threaded hole. The plug and the air nozzle are fitted with sealing rings, and the end of the sealing ring has a protrusion corresponding to the groove.

[0010] Furthermore, the plug and the air nozzle have a concave ring on the surface facing the positive pressure air inlet and the negative pressure air inlet, and the non-protruding end of the sealing ring matches the concave ring.

[0011] A micro differential pressure gauge includes a positive pressure inlet port comprising a side positive pressure inlet port and a bottom positive pressure inlet port, wherein an air nozzle is fitted on the side positive pressure inlet port and a sealing plate is provided on the bottom positive pressure inlet port; and a negative pressure inlet port includes a side negative pressure inlet port and a bottom negative pressure inlet port, wherein an air nozzle is fitted on the side negative pressure inlet port and a sealing plate is provided on the bottom negative pressure inlet port.

[0012] A micro differential pressure gauge includes a positive pressure inlet port comprising a side positive pressure inlet port and a bottom positive pressure inlet port, wherein a sealing plate is provided on the side positive pressure inlet port and an air nozzle is fitted on the bottom positive pressure inlet port; and a negative pressure inlet port includes a side negative pressure inlet port and a bottom negative pressure inlet port, wherein a sealing plate is provided on the side negative pressure inlet port and an air nozzle is fitted on the bottom negative pressure inlet port.

[0013] A micro differential pressure gauge includes a positive pressure inlet port comprising a side positive pressure inlet port and a bottom positive pressure inlet port, wherein an air nozzle is fitted onto the side positive pressure inlet port and a plug is fitted onto the bottom positive pressure inlet port; and a negative pressure inlet port comprises a side negative pressure inlet port and a bottom negative pressure inlet port, wherein an air nozzle is fitted onto the side negative pressure inlet port and a plug is fitted onto the bottom negative pressure inlet port.

[0014] A micro differential pressure gauge includes a positive pressure inlet port comprising a side positive pressure inlet port and a bottom positive pressure inlet port, wherein a plug is fitted onto the side positive pressure inlet port and an air nozzle is fitted onto the bottom positive pressure inlet port; and a negative pressure inlet port comprises a side negative pressure inlet port and a bottom negative pressure inlet port, wherein a plug is fitted onto the side negative pressure inlet port and an air nozzle is fitted onto the bottom negative pressure inlet port.

[0015] Furthermore, a plastic face ring is provided on the bottom shell.

[0016] This utility model has the following beneficial effects:

[0017] This utility model uses an engineering plastic injection molded bottom shell with four interfaces, which ensures structural strength while allowing users to seal one high-pressure and one low-pressure air hole as needed, and then install another high-pressure and one low-pressure air nozzle for use. It provides more, more reliable and optimized options in terms of air nozzles / plugs. By setting a sealing ring, the airtightness of the air nozzle and plug installed in the positive pressure air inlet or negative pressure air inlet is increased.

[0018] Of course, any product implementing this utility model does not necessarily need to achieve all of the advantages described above at the same time. Attached Figure Description

[0019] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 For molds without bottom air intake requirements, the bottom hole is blocked, and a micro differential pressure gauge with an air intake nozzle is installed on the side;

[0021] Figure 2 For molds without side air intake requirements, the side holes are blocked, and a micro differential pressure gauge with an air intake nozzle is installed at the bottom;

[0022] Figure 3 It features a micro differential pressure gauge with four fully open holes on the bottom and sides, a bottom plug to seal the holes, and an air inlet nozzle mounted on the side.

[0023] Figure 4 It features four fully open holes on the bottom and sides, with side plugs to seal the holes, and a micro differential pressure gauge with an air inlet nozzle installed at the bottom.

[0024] Figure 5 This is a schematic diagram of the air intake structure;

[0025] Figure 6 This is a schematic diagram of the gas nozzle structure;

[0026] Figure 7 This is a schematic diagram of the plug structure;

[0027] The attached diagram lists the components represented by each number as follows:

[0028] 1. Air nozzle; 2. Side negative pressure air inlet; 3. Sealing plate; 4. Side positive pressure air inlet; 5. Bottom shell; 6. Bottom positive pressure air inlet; 7. Bottom negative pressure air inlet; 8. Plug; 9. Face ring; 501. Stepped hole; 502. Groove; 101. Wrench position; 102. Protrusion; 103. Sealing ring. Detailed Implementation

[0029] 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 skilled in the art without creative effort are within the protection scope of the present utility model.

[0030] In the description of this utility model, it should be understood that the terms "opening", "upper", "lower", "thickness", "top", "middle", "length", "inner", "around" and other terms indicating orientation or positional relationship are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the components or elements referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0031] Please see Figure 1-7 As shown, this utility model is a micro differential pressure gauge, including a bottom shell 5. The bottom shell 5 has two positive pressure air inlets and two negative pressure air inlets. There are four high and low pressure air inlets on the back and sides of the bottom shell 5, and two air nozzles and plugs are attached to each. Users can block one high and one low pressure air inlet as needed, and then install another high and one low pressure air nozzle for use, or the positive pressure air inlet and the negative pressure air inlet can be blocked directly during the production of the bottom shell 5.

[0032] That is: a detachable connecting plug 8 or a sealing plate 3 is provided on one positive pressure air inlet, and an air nozzle 1 is installed on the other positive pressure air inlet; a detachable connecting plug 8 or a sealing plate 3 is provided on one negative pressure air inlet, and an air nozzle 1 is installed on the other negative pressure air inlet.

[0033] Preferably, the bottom shell 5 is a PC+GF engineering plastic shell, with glass fiber added to the PC base material to ensure hardness without becoming brittle, thus avoiding a significant decrease in structural strength caused by using plastic materials.

[0034] Furthermore, a face ring 9 is provided on the bottom shell 5, and the face ring is a plastic face ring.

[0035] Furthermore, both the positive pressure air inlet and the negative pressure air inlet include a stepped hole 501. A groove 502 is opened on the stepped surface of the stepped hole 501. The fine hole of the stepped hole 501 is a threaded hole, and the wide hole is a ground hole. A sealing ring 103 is fitted on the plug 8 and the air nozzle 1. The end of the sealing ring 1023 is provided with a protrusion 102 corresponding to the groove 502. A concave ring is opened on the surface of the wrench position on the plug and the air nozzle facing the positive pressure air inlet and the negative pressure air inlet. The non-protruding end of the sealing ring 103 cooperates with the concave ring 102. By setting the sealing ring 103, the airtightness of the air nozzle 1 and the plug installed in the positive pressure air inlet or the negative pressure air inlet is increased. After the sealing ring is placed in the air inlet by the positioning of the protrusion 102, the plug 8 or the air nozzle 1 is installed.

[0036] like Figure 1 As shown: A micro differential pressure gauge, the positive pressure inlet includes a side positive pressure inlet 4 and a bottom positive pressure inlet 6, the side positive pressure inlet 4 is fitted with an air nozzle 1, and the bottom positive pressure inlet 6 is provided with a sealing plate 3; the negative pressure inlet includes a side negative pressure inlet 2 and a bottom negative pressure inlet 7, the side negative pressure inlet 2 is fitted with an air nozzle 1, and the bottom negative pressure inlet 7 is provided with a sealing plate 3.

[0037] like Figure 2 As shown: A micro differential pressure gauge, the positive pressure inlet includes a side positive pressure inlet 4 and a bottom positive pressure inlet 6, the side positive pressure inlet 4 is provided with a sealing plate 3, and the bottom positive pressure inlet 6 is fitted with an air nozzle 1; the negative pressure inlet includes a side negative pressure inlet 2 and a bottom negative pressure inlet 7, the side negative pressure inlet 2 is provided with a sealing plate 3, and the bottom negative pressure inlet 7 is fitted with an air nozzle 1.

[0038] like Figure 3 As shown: A micro differential pressure gauge, the positive pressure air inlet includes a side positive pressure air inlet 4 and a bottom positive pressure air inlet 6, the side positive pressure air inlet 4 is fitted with an air nozzle 1, and the bottom positive pressure air inlet 6 is fitted with a plug 8; the negative pressure air inlet includes a side negative pressure air inlet 2 and a bottom negative pressure air inlet 7, the side negative pressure air inlet 2 is fitted with an air nozzle 1, and the bottom negative pressure air inlet 7 is fitted with a plug 8.

[0039] like Figure 4 As shown: A micro differential pressure gauge, the positive pressure air inlet includes a side positive pressure air inlet 4 and a bottom positive pressure air inlet 6, the side positive pressure air inlet 4 is fitted with a plug 8, and the bottom positive pressure air inlet 6 is fitted with an air nozzle 1; the negative pressure air inlet includes a side negative pressure air inlet 2 and a bottom negative pressure air inlet 7, the side negative pressure air inlet 2 is fitted with a plug 8, and the bottom negative pressure air inlet 7 is fitted with an air nozzle 1.

[0040] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0041] The preferred embodiments of this utility model disclosed above are merely illustrative of the present utility model. These preferred embodiments do not exhaustively describe all details, nor do they limit the utility model to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of this utility model, thereby enabling those skilled in the art to better understand and utilize it. This utility model is limited only by the claims and their full scope and equivalents.

Claims

1. A micro differential pressure gauge, comprising a base shell (5), characterized in that: The bottom shell (5) has two positive pressure air inlets and two negative pressure air inlets. One of the positive pressure air inlets has a detachable connecting plug (8) or a sealing plate (3), and the other positive pressure air inlet is equipped with an air nozzle (1). One of the negative pressure air inlets has a detachable connecting plug (8) or a sealing plate (3), and the other negative pressure air inlet is equipped with an air nozzle (1). The bottom shell (5) is a PC+GF engineering plastic shell.

2. The micro differential pressure gauge according to claim 1, characterized in that, Both the positive pressure air inlet and the negative pressure air inlet include a stepped hole (501). The stepped hole (501) has a groove (502) on its stepped surface. The fine hole of the stepped hole (501) is a threaded hole. The plug (8) and the air nozzle (1) are fitted with a sealing ring (103). The end of the sealing ring (103) is provided with a protrusion (102) corresponding to the groove (502).

3. A micro differential pressure gauge according to claim 2, characterized in that, The plug (8) and the air nozzle (1) have a concave ring on the surface of the wrench position (101) facing the positive pressure air inlet and the negative pressure air inlet, and the non-protruding end of the sealing ring (103) matches the concave ring.

4. A micro differential pressure gauge according to any one of claims 1-3, characterized in that, The positive pressure air inlet includes a side positive pressure air inlet (4) and a bottom positive pressure air inlet (6). The side positive pressure air inlet (4) is fitted with an air nozzle (1), and the bottom positive pressure air inlet (6) is provided with a sealing plate (3). The negative pressure air inlet includes a side negative pressure air inlet (2) and a bottom negative pressure air inlet (7). The side negative pressure air inlet (2) is fitted with an air nozzle (1), and the bottom negative pressure air inlet (7) is provided with a sealing plate (3).

5. A micro differential pressure gauge according to any one of claims 1-3, characterized in that, The positive pressure air inlet includes a side positive pressure air inlet (4) and a bottom positive pressure air inlet (6). The side positive pressure air inlet (4) is provided with a sealing plate (3), and the bottom positive pressure air inlet (6) is fitted with an air nozzle (1). The negative pressure air inlet includes a side negative pressure air inlet (2) and a bottom negative pressure air inlet (7). The side negative pressure air inlet (2) is provided with a sealing plate (3), and the bottom negative pressure air inlet (7) is fitted with an air nozzle (1).

6. A micro differential pressure gauge according to any one of claims 1-3, characterized in that, The positive pressure air inlet includes a side positive pressure air inlet (4) and a bottom positive pressure air inlet (6). The side positive pressure air inlet (4) is fitted with an air nozzle (1), and the bottom positive pressure air inlet (6) is fitted with a plug (8). The negative pressure air inlet includes a side negative pressure air inlet (2) and a bottom negative pressure air inlet (7). The side negative pressure air inlet (2) is fitted with an air nozzle (1), and the bottom negative pressure air inlet (7) is fitted with a plug (8).

7. A micro differential pressure gauge according to any one of claims 1-3, characterized in that, The positive pressure air inlet includes a side positive pressure air inlet (4) and a bottom positive pressure air inlet (6). A plug (8) is fitted on the side positive pressure air inlet (4), and an air nozzle (1) is fitted on the bottom positive pressure air inlet (6). The negative pressure air inlet includes a side negative pressure air inlet (2) and a bottom negative pressure air inlet (7). A plug (8) is fitted on the side negative pressure air inlet (2), and an air nozzle (1) is fitted on the bottom negative pressure air inlet (7).

8. A micro differential pressure gauge according to claim 1, characterized in that, The bottom shell (5) is provided with a face ring (9), which is a plastic face ring.

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