Auxiliary comparison device for piston type pressure gauge

Abstract

The utility model provides an auxiliary comparison device for a piston type pressure gauge, and relates to the technical field of piston type pressure gauges. The auxiliary comparison device for the piston type pressure gauge comprises a device body, the upper portion of the device body is provided with a pressure detection gauge and a pressure adjusting disc, the upper portion of the device body is fixedly connected with two sliding rods, the two sliding rods are located on the two sides of the pressure adjusting disc respectively, and a clamping ring is slidably connected between the two sliding rods. Sliding grooves distributed in a circumferential array mode are formed in the inner wall of the clamping ring, and rack rods are connected into the sliding grooves in a sliding mode. According to the auxiliary comparison device for the piston type pressure gauge, the clamping ring is arranged, a worker only needs to rotate an outer gear ring in the clamping ring, and a weight can be clamped through a rubber cushion plate on the clamping ring, so that the worker can take and place the weight under the condition that the worker does not make direct contact with the weight; therefore, stains such as hand sweat are effectively prevented from adhering to the weight, the service life of the weight can be effectively prolonged, and the weight use accuracy can be effectively improved.

Description

Technical Field

[0001] The utility model relates to an auxiliary comparison device for a piston pressure gauge, in particular to an auxiliary comparison device for a piston pressure gauge, and belongs to the technical field of piston pressure gauges. Background Art

[0002] The piston pressure gauge is a standard pressure measuring instrument with high accuracy, high reproducibility and high reliability based on Pascal's law and the principle of fluid static equilibrium.

[0003] Piston pressure gauges are also often referred to as piston pressure gauges or pressure gauges, and are also called pressure balances. They are mainly used as pressure reference devices in metering rooms, laboratories, and production or scientific experiments. Piston pressure gauges are also directly used in high-reliability monitoring links to monitor other local instruments.

[0004] Piston pressure gauges have the advantages of high accuracy, stable performance, and simple operation. They have been widely promoted and used in value transfer, precision measurement, and routine measurement.

[0005] There are two main sources of error for piston pressure gauges: one is the effective area of ​​the piston A; the other is the mass of the weight m. Since gravity acceleration varies from place to place, it has a great impact on the error of the piston pressure gauge. When using piston pressure gauges in different regions, it is important to correct the mass of the weight according to the gravity acceleration of the place of use;

[0006] Currently, piston pressure gauges need to be debugged before use. The debugging process mainly uses weights and display instruments, or uses other pressure equipment to assist in comparison operations. During the use or comparison operation of the piston pressure gauge, the weights are generally taken and placed by human contact, which is inefficient. At the same time, stains such as sweat on the hands can easily adhere to the weights, causing corrosion of the weights and affecting the service life of the weights. Utility Model Content

[0007] 1. Technical issues to be resolved

[0008] The purpose of the utility model is to provide a piston pressure gauge auxiliary comparison device in order to solve the above problems, so as to solve the problem in the prior art that the piston pressure gauge auxiliary comparison device needs manual placement of weights, thus affecting the service life of the weights.

[0009] (II) Technical solution

[0010] The utility model is implemented through the following technical scheme: a piston pressure gauge auxiliary comparison device, including a device body, a pressure detection gauge and a pressure regulating disk are arranged on the upper part of the device body, two sliding rods are fixedly connected to the upper part of the device body, the two sliding rods are respectively located on both sides of the pressure regulating disk, and a clamping ring is slidably connected between the two sliding rods, a sliding groove distributed in a circumferential array is formed on the inner wall of the clamping ring, a rack rod is slidably connected in the sliding groove, an outer gear ring and gears distributed in a circumferential array are rotatably connected in the clamping ring, each of the gears is respectively meshed with each rack rod, and a rubber pad is installed at one end of the rack rod.

[0011] Preferably, threaded rods are rotatably connected in the two rotating grooves opened on the upper part of the device body, and the two threaded rods are respectively located on both sides of the pressure regulating disk. A top block is threadedly sleeved on the threaded rod, and a through sliding hole is opened on the upper part of the top block. The top block is slidably connected to the sliding rod through the sliding hole.

[0012] Preferably, a motor is installed in the device body, the movable end of the motor is fixedly connected to the bottom end of the threaded rod, a rotating belt is fixedly sleeved on the bottom end of the threaded rod, and a chain is transmission-connected between the two rotating belts.

[0013] Preferably, a hidden groove is provided on the upper portion of the clamping ring, and an arc-shaped pull ring is rotatably connected to the inner wall of the hidden groove.

[0014] Preferably, a worm wheel and a worm screw are rotatably connected in the clamping ring and mesh with each other, and the axis of the worm wheel is fixedly connected to the upper part of the gear at the bottom.

[0015] Preferably, a fixed shaft is fixedly connected to the center of the upper portion of the pressure regulating disk, and a plurality of weights are provided on the sliding sleeve outside the fixed shaft, and the weights are located on the inner side of the clamping ring.

[0016] Preferably, support feet are fixedly connected to the four corners of the bottom of the device body.

[0017] The utility model provides a piston pressure gauge auxiliary comparison device, which has the following beneficial effects:

[0018] 1. The piston pressure gauge auxiliary comparison device is equipped with a clamping ring. The staff only needs to rotate the outer tooth ring in the clamping ring to clamp the weight with the rubber pad on the clamping ring. In this way, the staff can take and put the weight without direct contact with the weight, thus effectively preventing stains such as hand sweat from adhering to the weight, and effectively improving the service life of the weight and the accuracy of weight use.

[0019] 2. The piston pressure gauge auxiliary comparison device is provided with a top plate, which can be used to lift the weights placed on the pressure adjustment disk, thereby improving the convenience of taking and placing the weights. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a three-dimensional schematic diagram of the utility model as a whole;

[0021] Figure 2 It is a three-dimensional schematic diagram of the device body of the utility model;

[0022] Figure 3 It is a schematic diagram of the cross-sectional structure of the utility model as a whole;

[0023] Figure 4 It is a three-dimensional schematic diagram of the clamping ring of the utility model;

[0024] Figure 5 It is a three-dimensional schematic diagram of the cooperation between the outer gear ring and the gear of the utility model.

[0025]

Main component symbol description

[0026] 1. Device body; 2. Pressure detection gauge; 3. Pressure adjustment plate; 4. Sliding rod; 5. Clamping ring; 6. Rack rod; 7. External gear ring; 8. Gear; 9. Rubber pad; 10. Threaded rod; 11. Top block; 12. Motor; 13. Hidden groove; 14. Arc pull ring; 15. Worm gear; 16. Worm; 17. Fixed shaft; 18. Weight. DETAILED DESCRIPTION

[0027] The embodiment of the utility model provides a piston pressure gauge auxiliary comparison device.

[0028] See also Figures 1 to 5 , including a device body 1, a pressure detection gauge 2 and a pressure regulating disk 3 are arranged on the upper part of the device body 1, two slide bars 4 are fixedly connected to the upper part of the device body 1, the two slide bars 4 are respectively located on both sides of the pressure regulating disk 3, and a clamping ring 5 is slidably connected between the two slide bars 4, a slide groove distributed in a circumferential array is formed on the inner wall of the clamping ring 5, a rack rod 6 is slidably connected in the slide groove, an outer gear ring 7 and a gear 8 distributed in a circumferential array are rotatably connected in the clamping ring 5, each gear 8 is respectively meshed with each rack rod 6, and a rubber pad 9 is installed at one end of the rack rod 6;

[0029] The device body 1 is a piston pressure gauge, and the pressure detection gauge 2 and the pressure regulating disk 3 are both existing technical structures or devices of the piston pressure gauge, wherein the pressure detection gauge 2 and the pressure regulating disk 3 used are purchased parts, which are selected according to the requirements of power and size, and this application will not go into details;

[0030] Put the clamping ring 5 on the outside of the weight, and then rotate the outer gear ring 7, the outer gear ring 7 uses the gear 8 to drive the rack rod 6 to slide in the slide groove, so that each rubber pad 9 moves toward the weight direction at the same time, and cooperates to clamp and fix the weight; after that, the staff only needs to move the clamping ring 5 to put the weight on the pressure adjustment plate 3;

[0031] Use the horizontal adjustment screw to make the bubble of the level of the device body 1 in the center position. According to the pressure value of the pressure detection gauge 2, a weight with the same pressure value should be added. Keep the device body 1 at a constant temperature at the specified ambient temperature, generally for 1-2 hours. Open the right stop valve, then open the left pressure relief valve, use the pre-pressure pump to exhaust the air in the inner cavity, and then close the left pressure relief valve. Check the working position of the piston. After the power is turned on, when the digital meter of the device body 1 shows about zero, it means that the piston of the device body 1 has fallen to the bottom (no pressure or too low pressure). When the pressure detection gauge 2 shows 3mm above zero and below, it means that the device body 1 has been working normally and the pressure value is accurate. If it exceeds 3mm, it means that the pressure is too high. Use the pre-pressure pump to pressurize. When using the pre-pressure pump to pressurize, when you feel that there is pressure in the inner cavity, you can continue to pressurize while withdrawing the screw rod of the pressure regulator. The longest withdrawal length shall not exceed 50mm, and then close the right stop valve (Note: Do not use excessive force when withdrawing the pressure regulator to avoid damaging the screw rod). Add a weight 18 corresponding to the pressure to be measured to the device body 1, first use both hands to turn the fixed shaft 17 on the weight 18 to make it rotate, the speed is about (30-60) r / min, then use the pressure regulator to increase the pressure to make the piston rise. Read the reading when the pointer on the piston working position indicator reaches near zero. After reading the first point, the pressure should be reduced by the pressure regulator first; let the piston drop to the lowest position, then add the weight value corresponding to the second point measurement on the pressure gauge, and then use the pressure regulator to increase the pressure and read the reading until the positive stroke measurement is completed. When measuring the reverse stroke, it is still necessary to reduce the pressure with the pressure regulator first. Avoid using the pressure relief valve to reduce the pressure during operation, especially when measuring high pressure, this operation method is likely to break the piston and damage the pressure gauge. After the measurement is completed, the pressure relief valve on the left should be opened, and the pressure regulator should be screwed in to restore it to its original state. Remove the instrument to be measured and add a plug to the quick connector.

[0032] See also Figure 2 , the two rotating grooves opened on the upper part of the device body 1 are both rotatably connected with threaded rods 10, and the two threaded rods 10 are respectively located on both sides of the pressure regulating disk 3, and a top block 11 is threadedly sleeved on the threaded rod 10, and a through-type sliding hole is opened on the top of the top block 11, and the top block 11 is slidably connected with the sliding rod 4 through the sliding hole;

[0033] By rotating the threaded rod 10 , the threaded rod 10 drives the top block 11 to move up and down, and the top block 11 is used to push the clamping ring 5 to move up and down, so that the clamping ring 5 is used to clamp the weight installed on the pressure regulating disk 3 to move up and down.

[0034] See also Figure 3 A motor 12 is installed in the device body 1, and the movable end of the motor 12 is fixedly connected to the bottom end of the threaded rod 10. A rotating belt is fixedly sleeved at the bottom end of the threaded rod 10, and a chain is connected between the two rotating belts;

[0035] The motor 12 is electrically connected to the power supply. The motor 12 used is a purchased part, which is selected according to the power and size requirements. This application will not go into details.

[0036] One of the threaded rods 10 is driven to rotate by the motor 12 , and the threaded rod 10 drives the other threaded rod 10 to rotate together by the chain, so that the two top blocks 11 can be raised and lowered at the same time.

[0037] See also Figure 4 A hidden groove 13 is provided on the upper part of the clamping ring 5, and an arc-shaped pull ring 14 is rotatably connected to the inner wall of the hidden groove 13;

[0038] The staff can lift the clamping ring 5 through the arc-shaped pull ring 14 .

[0039] See also Figure 5 A worm wheel 15 and a worm 16 are rotatably connected in the clamping ring 5 and meshed with each other, and the axis of the worm wheel 15 is fixedly connected to the upper part of the bottom gear 8;

[0040] By rotating the worm 16 , the worm 16 drives one of the gears 8 to rotate through the worm wheel 15 , and the gear 8 drives the outer gear ring 7 to rotate, and the outer gear ring 7 drives the other gears 8 to rotate in the same direction.

[0041] See also Figure 1 A fixed shaft 17 is fixedly connected to the center of the upper part of the pressure regulating disk 3 , and a plurality of weights 18 are provided on the sliding sleeve outside the fixed shaft 17 , and the weights 18 are located on the inner side of the clamping ring 5 .

[0042] See also Figure 1 The four corners at the bottom of the device body 1 are fixedly connected with supporting feet.

[0043] The above shows and describes the basic principle and main features of the utility model and the advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection claimed by the utility model is defined by the attached claims and their equivalents.

Claims

1. A piston pressure gauge auxiliary comparison device, comprising a device body (1), characterized in that: A pressure detection gauge (2) and a pressure regulating disk (3) are arranged on the upper part of the device body (1); two sliding rods (4) are fixedly connected to the upper part of the device body (1); the two sliding rods (4) are respectively located on the two sides of the pressure regulating disk (3); and a clamping ring (5) is slidably connected between the two sliding rods (4); a sliding groove distributed in a circumferential array is formed on the inner wall of the clamping ring (5); a rack rod (6) is slidably connected in the sliding groove; an outer gear ring (7) and gears (8) distributed in a circumferential array are rotatably connected in the clamping ring (5); each gear (8) is respectively meshed with each rack rod (6); and a rubber pad (9) is installed at one end of the rack rod (6).

2. A piston pressure gauge auxiliary comparison device according to claim 1, characterized in that: Threaded rods (10) are rotatably connected in two rotating grooves opened on the upper part of the device body (1). The two threaded rods (10) are respectively located on both sides of the pressure regulating disk (3). A top block (11) is threadedly sleeved on the threaded rod (10). A through-type sliding hole is opened on the upper part of the top block (11). The top block (11) is slidably connected to the sliding rod (4) through the sliding hole.

3. A piston pressure gauge auxiliary comparison device according to claim 2, characterized in that: A motor (12) is installed in the device body (1), the movable end of the motor (12) is fixedly connected to the bottom end of the threaded rod (10), the bottom end of the threaded rod (10) is fixedly sleeved with a rotating belt, and a chain is connected between the two rotating belts for transmission.

4. The piston pressure gauge auxiliary comparison device according to claim 1, characterized in that: A hidden groove (13) is provided on the upper part of the clamping ring (5), and an arc-shaped pull ring (14) is rotatably connected to the inner wall of the hidden groove (13).

5. The piston pressure gauge auxiliary comparison device according to claim 1, characterized in that: A worm wheel (15) and a worm (16) are rotatably connected in the clamping ring (5) and mesh with each other. The axis of the worm wheel (15) is fixedly connected to the upper part of the gear (8) at the bottom.

6. The piston pressure gauge auxiliary comparison device according to claim 1, characterized in that: A fixed shaft (17) is fixedly connected at the center of the upper part of the pressure regulating disk (3), and a plurality of weights (18) are provided on the sliding sleeve outside the fixed shaft (17), and the weights (18) are located inside the clamping ring (5).

7. The piston pressure gauge auxiliary comparison device according to claim 1, characterized in that: Support feet are fixedly connected to the four corners of the bottom of the device body (1).

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