Pressure gauge

Abstract

The utility model discloses a pressure gauge, which relates to the pressure gauge technology and comprises a shell and a bourdon tube, a joint is fixed at one end of the bourdon tube, a square tube is communicated on the joint, a sealing block is slidably connected in the square tube, a groove is arranged on the sealing block, a connecting rod is arranged on the sealing block, and a blowing balloon is arranged at one end of the connecting rod. When the outer wall of the sealing block abuts against the inner wall of the connector, the air blowing ball abuts against the end face of the square pipe, and air in the air blowing ball can enter the connector. In the use process of the pressure gauge, when the pointer of the pressure gauge does not change, people can use the sealing block to separate the connecting pipe from the connector and press air in the air blowing ball into the square pipe, if the pointer rotates at the moment, the pressure gauge does not break down, otherwise, the pressure gauge breaks down and needs to be replaced. According to the arrangement, detection of the pressure gauge is convenient, and the square tube made of aluminum alloy has high strength, so that the square tube can adapt to a high-pressure working environment.

Description

Technical Field

[0001] The utility model relates to pressure gauge technology, and more particularly to a pressure gauge. Background Art

[0002] A pressure gauge is an instrument used to measure and indicate pressures higher than the ambient pressure. It can be used to display the pressure value inside the measured container in real time. People can determine whether the container is safe by observing the value of the pressure gauge and then proceed with subsequent operation steps.

[0003] The pressure gauge consists of a joint, a spring tube, an index dial, a pointer and a casing. The joint is usually connected to the connecting tube of the object to be measured. The spring tube is hollow inside and connected to the joint. The pressure inside the object to be measured is transmitted to the spring tube through the joint. The spring tube deforms under the action of pressure, driving the pointer to rotate, so that the movable end of the pointer points to different positions on the index dial.

[0004] When people add pressure to a container, the pointer may not move. At this time, people cannot determine whether there is a leak in the connecting pipe or damage inside the pressure gauge, and people need to spend a lot of time to find the fault.

[0005] Therefore, new solutions need to be proposed to solve this problem. Utility Model Content

[0006] In view of the deficiencies in the prior art, the present invention aims to provide a pressure gauge.

[0007] The above technical purpose of the present utility model is achieved through the following technical solutions: a pressure gauge, comprising a shell and a spring tube installed in the shell, one end of the spring tube is fixed with a joint passing through the shell, the side wall of the joint is connected to a square tube, a sealing block for sealing the square tube or the joint is slidably connected in the square tube, a groove is provided on the sealing block, a connecting rod is provided on the sealing block, and a blowing ball for injecting air into the square tube is provided at one end of the connecting rod, when the outer wall of the sealing block collides with the inner wall of the joint, the blowing ball collides with the end face of the square tube, and the air in the blowing ball can enter the joint through the square tube and the groove in turn.

[0008] The utility model is further configured as follows: an air inlet is provided at one end of the blowing ball facing away from the square tube, and a plurality of one-way valves are provided on the outer edge of the air inlet, which only allow external air to enter the blowing ball.

[0009] The utility model is further configured as follows: a sliding groove is provided on the inner wall of the square tube, and a plurality of supporting rods slidably connected to the sliding groove are provided on the side wall of the connecting rod.

[0010] The utility model is further configured such that the length of the chute is smaller than the length of the square tube.

[0011] The utility model is further configured as follows: a rubber ring is provided on the end surface of the square tube for sealing the gap between the blowing ball and the inner wall of the square tube.

[0012] The utility model is further configured as follows: a skeleton fixedly connected to the connecting rod is provided in the blowing ball.

[0013] The utility model is further configured as follows: the square tube is made of aluminum alloy.

[0014] In summary, the present invention has the following beneficial effects: when people add pressure to the container but the pointer of the pressure gauge does not change, they can first stop the pressurizing operation and slide the sealing block into the joint. At this time, the sealing block separates the joint from the connecting pipe, and then press the blowing balloon to press the air in the blowing balloon into the square tube through the square tube and the groove in turn. The above operation increases the air pressure in the square tube and the spring tube. If the pointer position changes at this time, it indicates that the pressure gauge is not faulty, and people should look for air leakage in the container. If the pointer position still does not change, it means that the pressure gauge is faulty and needs to be repaired. The pressure gauge is maintained and replaced, and the setting of the blowing balloon and the square tube allows people to test whether the pressure gauge is normal by directly adding pressure to the pressure gauge. Compared with removing the pressure gauge and then testing it with professional equipment, this method allows the pressure gauge to be tested without being separated from the container, making the pressure gauge test more convenient and saving people's time. After repairing the faulty equipment, people can slide the sealing block back into the square tube. At this time, the connecting pipe is connected to the joint, and the pressure in the container is balanced with the pressure in the spring tube. People can again determine the pressure in the container by the change of the pointer. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural diagram of the utility model;

[0016] Figure 2 It is a partial cross-sectional view of the present utility model.

[0017] In the figure: 1. Shell; 2. Spring tube; 3. Joint; 4. Square tube; 5. Sealing block; 6. Groove; 7. Connecting rod; 8. Blowing ball; 9. One-way valve; 10. Slide; 11. Support rod; 12. Rubber ring; 13. Frame. DETAILED DESCRIPTION

[0018] The present invention will be described in detail below with reference to the accompanying drawings and embodiments.

[0019] A pressure gauge, such as Figure 1 and Figure 2As shown, it includes a shell 1 and a spring tube 2 installed in the shell 1, one end of the spring tube 2 is fixed with a joint 3 passing through the shell 1, and a square tube 4 is connected to the side wall of the joint 3, and a sealing block 5 for closing the square tube 4 or the joint 3 is slidably connected in the square tube 4, and a groove 6 is opened on the sealing block 5, and a connecting rod 7 is provided on the sealing block 5. One end of the connecting rod 7 is provided with a blowing ball 8 for injecting air into the square tube 4. When the outer wall of the sealing block 5 conflicts with the inner wall of the joint 3, the blowing ball 8 conflicts with the end face of the square tube 4, and the air in the blowing ball 8 can enter the joint 3 through the square tube 4 and the groove 6 in turn. When people pressurize the container but the pointer of the pressure gauge does not change, the pressurizing operation can be stopped first, and the sealing block 5 can be slid into the joint 3. At this time, the sealing block 5 separates the joint 3 from the connecting pipe, and then presses the blowing ball 8, and the air in the blowing ball 8 is pressed into the square tube 4 through the square tube 4 and the groove 6 in turn. The operation causes the air pressure in the square tube 4 and the spring tube 2 to rise. If the pointer position changes at this time, it indicates that the pressure gauge is not faulty, and people should look for air leaks in the container. If the pointer position still does not change, it means that the pressure gauge is faulty and needs to be maintained and replaced. The setting of the blowing balloon 8 and the square tube 4 allows people to test whether the pressure gauge is normal by directly adding pressure to the pressure gauge. Compared with removing the pressure gauge and then testing it with professional equipment, this method allows the pressure gauge to be tested without being separated from the container, making the pressure gauge test more convenient and saving people's time. After repairing the faulty equipment, people can slide the sealing block 5 back into the square tube 4. At this time, the connecting pipe is connected to the joint 3, and the pressure in the container is balanced with the pressure in the spring tube 2. People can again determine the pressure in the container by the change of the pointer.

[0020] like Figure 2As shown, the air inflator 8 is provided with an air inlet at the end opposite to the square tube 4, and the outer edge of the air inlet is provided with a plurality of one-way valves 9, which only allow external air to enter the air inflator 8. When a person presses the air inflator 8, the one-way valves 9 prevent the air inside the air inflator 8 from overflowing out of the air inlet, so that the air in the air inflator 8 can be better pressed into the square tube 4. After the air inflator 8 is pressed, the air pressure inside the air inflator 8 decreases during the process of the air inflator 8 returning to its original shape. At this time, external air can enter the air inflator 8 through the one-way valves 9, so that the air inflator 8 can recover quickly. A person can use the air inflator 8 again in the subsequent process. The inner wall of the square tube 4 is provided with a sliding groove 10, and the side wall of the connecting rod 7 is provided with a plurality of support rods 11 which are slidably connected in the sliding groove 10. During the process of pushing the sealing block 5 into the connector 3, the support rods 11 slidably connected in the sliding groove 10 can guide the movement of the connecting rod 7, so that the connecting rod 7 is not easy to change in the vertical direction, and thus the sealing block 5 can slide into the connector 3 more stably. In addition, when the sealing block 5 contacts the inner wall of the connector 3, the support rods 11 in the sliding groove 10 also prevent the sealing block 5 from sliding in the length direction of the connector 3, so that the sealing block 5 can better seal the connector 3. The length of the sliding groove 10 is less than the length of the square tube 4. This arrangement makes it difficult for the sealing block 5 to be completely pulled out of the square tube 4 when a person pulls the sealing block 5 out of the connector 3, because the inner wall of the sliding groove 10 limits the sliding distance of the support rods 11, so that the sealing block 5 is not easy to separate from the square tube 4. The end surface of the square tube 4 is provided with a rubber ring 12 for sealing the gap between the air inflator 8 and the inner wall of the square tube 4. When a person presses the air inflator 8 to make the air inside the air inflator 8 enter the square tube 4, the rubber ring 12 can better seal the gap between the air inflator 8 and the inner wall of the square tube 4, so that the air in the air inflator 8 is not easy to overflow and can be better pressed into the square tube 4. The air inflator 8 is provided with a framework 13 which is fixedly connected with the connecting rod 7. During the normal use of the pressure gauge, when a person applies force to the surface of the air inflator 8, the framework 13 can better transmit the force to the connecting rod 7, so that the connecting rod 7 can push the sealing block 5 to slide. The square tube 4 is made of aluminum alloy. Aluminum alloy has high strength, and the square tube 4 made of aluminum alloy can better adapt to high-pressure working environment.

[0021] The preferred embodiments of the present application have been described above, but the protection scope of the present application is not limited to the above-mentioned embodiments. Any technical solutions falling within the concept of the present application shall fall within the protection scope of the present application. It should be noted that, for ordinary technical personnel in the technical field, some improvements and decorations without departing from the principles of the present application shall also be considered as falling within the protection scope of the present application.

Claims

1. A pressure gauge, characterized in that: The invention comprises a shell (1) and a spring tube (2) installed in the shell (1), wherein a joint (3) passing through the shell (1) is fixed to one end of the spring tube (2), a square tube (4) is connected to the side wall of the joint (3), a sealing block (5) for sealing the square tube (4) or the joint (3) is slidably connected in the square tube (4), a groove (6) is provided on the sealing block (5), a connecting rod (7) is provided on the sealing block (5), and a blowing ball (8) for injecting air into the square tube (4) is provided at one end of the connecting rod (7), when the outer wall of the sealing block (5) contacts the inner wall of the joint (3), the blowing ball (8) contacts the end face of the square tube (4), and the air in the blowing ball (8) can enter the joint (3) through the square tube (4) and the groove (6) in sequence.

2. A pressure gauge according to claim 1, characterized in that: An air inlet is provided at one end of the blowing ball (8) facing away from the square tube (4), and a plurality of one-way valves (9) are provided on the outer edge of the air inlet. The one-way valves (9) only allow external air to enter the blowing ball (8).

3. A pressure gauge according to claim 2, characterized in that: A sliding groove (10) is provided on the inner wall of the square tube (4), and a plurality of supporting rods (11) slidably connected to the sliding groove (10) are provided on the side wall of the connecting rod (7).

4. A pressure gauge according to claim 3, characterized in that: The length of the chute (10) is smaller than the length of the square tube (4).

5. A pressure gauge according to claim 4, characterized in that: A rubber ring (12) is provided on the end surface of the square tube (4) for sealing the gap between the blowing ball (8) and the inner wall of the square tube (4).

6. A pressure gauge according to claim 5, characterized in that: The blowing ball (8) is provided with a skeleton (13) fixedly connected to the connecting rod (7).

7. A pressure gauge according to claim 6, characterized in that: The square tube (4) is made of aluminum alloy.

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