Diaphragm pressure gauge

Abstract

The utility model discloses a diaphragm pressure gauge which is installed on a pressure system and comprises a gauge box, a diaphragm body and a locking device, the diaphragm body comprises an upper diaphragm body, a lower diaphragm body and a diaphragm, the upper diaphragm body comprises an oil filling hole and an exhaust hole, the oil filling hole is obliquely arranged on the upper diaphragm body, the exhaust hole is arranged above the oil filling hole, and the locking device is arranged on the upper diaphragm body. The pressure source connector is arranged at the bottom of the lower diaphragm body, the locking device is connected with the upper diaphragm body and the lower diaphragm body and comprises a bolt and a locking nut, the bolt penetrates through threaded holes communicated with the upper diaphragm body and the lower diaphragm body, the locking nut is arranged at the upper end of the bolt, and the upper diaphragm body and the lower diaphragm body are clamped through the bolt and the locking nut. And the internal space is ensured to be in a closed state, and liquid cannot leak in the process of pressurizing or depressurizing the inner wall of the diaphragm body by liquid pressure.

Description

Technical Field

[0001] This utility model relates to the field of instrumentation technology, and in particular, to a diaphragm pressure gauge. Background Technology

[0002] In a typical pressure gauge, the diaphragm body consists of upper and lower diaphragms. The diaphragm is welded to the end face of the upper diaphragm body, sealing its chamber. To move the needle inside the pressure gauge, the diaphragm needs to be pushed, which in turn drives the medium oil in the upper diaphragm body to exert pressure. Normally, when injecting medium oil, a hole needs to be made in the upper diaphragm body to extract the gas from its chamber before injecting the medium oil. This affects the user's work efficiency and experience, so the structure needs to be improved. Utility Model Content

[0003] Therefore, it is necessary to provide a diaphragm pressure gauge.

[0004] The technical solution adopted by this utility model to solve its technical problem is: a diaphragm pressure gauge, including a gauge box and a diaphragm body. The gauge box includes a top rod. The diaphragm body includes an upper diaphragm body, a lower diaphragm body, and a diaphragm. The upper diaphragm body includes a receiving cavity, an upper sealing post, an oil inlet, and an exhaust port. A channel is formed in the upper sealing post. The receiving cavity communicates with the channel in the upper sealing post. The top rod in the gauge box is inserted into the sealing post of the upper diaphragm body. The oil inlet is obliquely opened on the upper diaphragm body. The exhaust port is horizontally opened directly above the oil inlet and close to the top of the receiving cavity.

[0005] Furthermore, the lower diaphragm body includes a pressure guiding cavity and a lower sealing column. The lower sealing column can extend into the pressure system and is arranged coaxially with the upper sealing column. The lower sealing column has a channel inside, and the pressure guiding cavity communicates with the channel inside the lower sealing column.

[0006] Furthermore, the diaphragm is held between the upper diaphragm body and the lower diaphragm body, while the edge of the diaphragm body is welded to the end face of the upper diaphragm body to seal the receiving cavity.

[0007] Furthermore, the diaphragm pressure gauge includes a locking device, which includes a bolt, a locking nut, an upper washer, and a lower washer. The upper washer is disposed around the upper end face of the upper diaphragm body, surrounding the upper sealing post, and the lower washer is disposed around the lower end face of the lower diaphragm body. The bolt connects the upper washer and the lower washer and passes through the upper and lower diaphragm bodies. By tightening the locking nut that fits the lower washer, the upper washer is pressed onto the upper diaphragm body, and the lower washer is pressed onto the lower diaphragm body.

[0008] Furthermore, there are four bolts, four lock nuts, four upper washers, and four lower washers.

[0009] The beneficial effects of this utility model are as follows: by providing an oil inlet 213 and an exhaust 214 to the upper diaphragm body 21, the oil inlet 213 is inclinedly opened on the upper diaphragm body 21, and the exhaust 213 is horizontally opened directly above the oil inlet 212 and close to the top of the receiving cavity 212, the medium oil can be injected more easily. At the same time, the air in the cavity is discharged from the exhaust 213 along with the injection of the medium oil, which improves the user experience and work efficiency. Attached Figure Description

[0010] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0011] Figure 1 This is a three-dimensional perspective view of the diaphragm pressure gauge shown in this utility model.

[0012] Figure 2 This is a top view of the diaphragm pressure gauge shown in this utility model.

[0013] Figure 3 yes Figure 2 The diaphragm pressure gauge shown is a cross-sectional view along CC.

[0014] Figure 4 This is a top view of the diaphragm pressure gauge shown in this utility model.

[0015] Figure 5 yes Figure 4 The diaphragm pressure gauge shown is a cross-sectional view along DD.

[0016] The component names and their numbers in the diagram are as follows:

[0017] 1. Gauge box, 11. Pin, 2. Diaphragm body, 21. Upper diaphragm body, 21. Upper sealing post, 211. Receiving cavity, 212. Oil inlet, 213. Vent, 214. Lower diaphragm body, 22. Pressure guiding cavity, 221. Lower sealing post, 222. Diaphragm, 23. Locking device, 3. Bolt, 31. Locking nut, 32. Upper gasket, 33. Lower gasket, 34. Detailed Implementation

[0018] The embodiments of the present invention are described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention. On the contrary, the embodiments of the present invention include all variations, modifications and equivalents falling within the spirit and scope of the appended claims.

[0019] like Figures 1 to 5As shown, this utility model provides a diaphragm pressure gauge, including a gauge box 1, a diaphragm body 2 installed below the gauge box, and a locking device 3 disposed on the diaphragm body 2.

[0020] A push rod 11 is installed in the meter box 1. The push rod 11 can be slidably inserted into the meter box 1, and the push rod 11 is connected to the diaphragm body 2.

[0021] The diaphragm body 2 includes a diaphragm 23, an upper diaphragm body 21, and a lower diaphragm body 22. The upper diaphragm body 21 and the lower diaphragm body are connected by a locking device 3. The upper diaphragm body 21 includes an upper sealing post 211, a receiving cavity 212, an oil inlet 213, and an exhaust port 214. A channel is formed in the upper sealing post 211, and the receiving cavity 212 communicates with the channel in the upper sealing post 211. The push rod 11 in the instrument box 1 is inserted into the sealing post 211 of the upper diaphragm body 21. The oil inlet 212 is obliquely opened on the upper diaphragm body 21, and the exhaust port 213 is horizontally opened on the upper diaphragm body 21. The lower diaphragm body 22 is located directly above the oil hole 212 and close to the top of the receiving cavity 212. It includes a pressure guiding cavity 221 and a lower sealing post 222. The lower sealing post 222 can extend into the pressure system. The lower sealing post 222 has a channel inside. The pressure medium in the pressure system can enter the diaphragm body 2 through the channel inside the lower sealing post 222, thereby driving the push rod 11 to move towards the watch box 1. The diaphragm 23 is clamped by the upper diaphragm body 21 and the lower diaphragm body 22. At the same time, the edge of the diaphragm 23 is welded to the end face of the upper diaphragm body 21, sealing the receiving cavity 212.

[0022] The locking device 3 includes a bolt 31, a locking nut 32, an upper washer 33, and a lower washer 34. The upper washer 33 covers the upper end face of the upper diaphragm body 21, and the lower washer 34 covers the lower end face of the lower diaphragm body 22. The bolt 31 connects the upper washer 33 and the lower washer 34, passes through the upper diaphragm body 21 and the lower diaphragm body 22, and is tightened by the locking nut that fits the lower washer 34. The upper washer 33 is then pressed onto the upper diaphragm body 21, and the lower washer 34 is pressed onto the lower diaphragm body 22.

[0023] The working principle of this utility model:

[0024] Before use, connect the meter box 1 to the interface of the upper diaphragm body 21 and tighten it. Then, inject oil into the oil inlet 213. When the oil overflows from the vent 214, seal the vent 214 with a screw. Then, when the diaphragm 23 bulges slightly, seal the oil inlet 213 with a screw.

[0025] In use, the lower sealing post 222 of the lower diaphragm body 22 is connected to the pressure system. The medium acts on the diaphragm 23 through the pressure guiding cavity 221. Through the elastic displacement of the diaphragm 23, the medium oil in the receiving cavity 212 is pushed, which drives the top rod 11 of the gauge box 1 to move upward.

[0026] Based on the above-described preferred embodiments of this utility model, and through the foregoing description, those skilled in the art can make various changes and modifications without departing from the scope of this utility model. The technical scope of this utility model is not limited to the contents of the specification, but must be determined according to the scope of the claims.

Claims

1. A diaphragm pressure gauge, characterized in that, The device includes a dial indicator and a diaphragm body. The dial indicator includes a push rod. The diaphragm body includes an upper diaphragm body, a lower diaphragm body, and a diaphragm. The upper diaphragm body includes a receiving cavity, an upper sealing post, an oil inlet, and an exhaust port. A channel is formed in the upper sealing post. The receiving cavity communicates with the channel in the upper sealing post. The push rod in the dial indicator is inserted into the sealing post of the upper diaphragm body. The oil inlet is obliquely opened on the upper diaphragm body. The exhaust port is horizontally opened directly above the oil inlet and close to the top of the receiving cavity.

2. The diaphragm pressure gauge as described in claim 1, characterized in that: The lower diaphragm includes a pressure guiding cavity and a lower sealing column. The lower sealing column can extend into the pressure system and is arranged coaxially with the upper sealing column. The lower sealing column has a channel inside, and the pressure guiding cavity communicates with the channel inside the lower sealing column.

3. The diaphragm pressure gauge as described in claim 1, characterized in that: The diaphragm is held between the upper diaphragm and the lower diaphragm, and the edge of the diaphragm is welded to the end face of the upper diaphragm to seal the receiving cavity.

4. The diaphragm pressure gauge as described in claim 1, characterized in that: The diaphragm pressure gauge includes a locking device, which includes a bolt, a locking nut, an upper washer, and a lower washer. The upper washer is disposed around the upper end face of the upper diaphragm body, surrounding the upper sealing post, and the lower washer is disposed around the lower end face of the lower diaphragm body. The bolt connects the upper washer and the lower washer and passes through the upper and lower diaphragm bodies. By tightening the locking nut that fits the lower washer, the upper washer is pressed onto the upper diaphragm body, and the lower washer is pressed onto the lower diaphragm body.

5. The diaphragm pressure gauge as described in claim 4, characterized in that: There are four bolts, four lock nuts, four upper washers, and four lower washers.

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