High-pressure gas flowmeter with flow limiting device

Abstract

The utility model provides a high-pressure gas flowmeter with a flow limiting device, and relates to the technical field of flowmeters. The flow meter comprises a flow meter body, the bottom face of the flow meter body is fixedly communicated with a connecting screw rod, the outer portion of the connecting screw rod is in threaded connection with an air inlet pipeline, a stainless steel powder metallurgy filter element and a bowl-shaped filter screen are fixedly installed in the air inlet pipeline, an adjusting hole is formed in the flow meter body, and the adjusting hole is communicated with the connecting screw rod. A flow limiting mechanism is arranged in the flow meter body. By arranging the adjusting handle, the adjusting cock, the mounting cap, the connecting slot and other parts, a manager can adjust the gas flow rate conveniently, the flow rate of the gas in the device can be controlled conveniently, and the transmission connecting rod can be taken down from the inside of the device through the adjusting handle, so that the device is convenient to use. Other personnel can be effectively prevented from randomly adjusting the gas flow in the device, so that gas waste and influence on welding forming quality caused by randomly increasing the flow by a welder are avoided.

Description

TECHNICAL FIELD

[0001] The utility model relates to a gas flowmeter, concretely to a high pressure gas flowmeter with flow limiting device belongs to flowmeter technical field. BACKGROUND

[0002] The high pressure gas flowmeter is a kind of precision flow measuring instrument, and is mainly used for measuring and controlling the flow of different gases.At present, there is no uniform standard for the inlet pressure of flowmeter in China, which can easily lead to the confusion of the inlet pressure reference of the scale of the existing flowmeter, and affect the interests of users.

[0003] According to the patent No.CN216899072U, an intelligent high pressure gas flowmeter is disclosed, which comprises a flowmeter main body, a fluid passage is arranged at the center position of the flowmeter main body, a front cover and a rear cover are respectively arranged on the upper side and the lower side of the flowmeter main body, and a pressure sensor and a flow sensor are arranged on one side of the rear cover connected with the flowmeter main body and penetrating the main body passage.

[0004] The above-mentioned scheme can accurately measure the fluid in the narrow space during implementation, but the gas flow rate adjusting mechanism is difficult to protect during implementation of the above-mentioned scheme, and the gas flow in the device can be adjusted at will by other personnel, which can cause a large amount of protective gas to be wasted.Therefore, we provide a high pressure gas flowmeter with flow limiting device to solve the above-mentioned problems. UTILITY MODEL CONTENTS

[0005] The utility model aims at providing a high pressure gas flowmeter with flow limiting device to solve the problem of inconvenient gas flow limiting of the gas flowmeter in the prior art.

[0006] The utility model is implemented by the following technical scheme: a high pressure gas flowmeter with flow limiting device, comprising a flowmeter main body, a connecting screw rod is fixedly connected in communication with the bottom surface of the flowmeter main body, an air inlet pipeline is threadedly connected outside the connecting screw rod, a stainless steel powder metallurgy filter element and a bowl-shaped filter screen are fixedly installed inside the air inlet pipeline, an adjusting hole is arranged in the inside of the flowmeter main body, a flow limiting mechanism is arranged in the inside of the flowmeter main body, the flow limiting mechanism comprises an adjusting handle and an adjusting plug, a transmission connecting rod is fixedly connected to the outer surface of the adjusting handle, and a mounting cap is slidably connected to the outer surface of the transmission connecting rod.

[0007] Preferably, the adjusting plug rotates in the inside of the flowmeter main body, an adjusting channel is arranged in the inside of the adjusting plug, and the adjusting plug has the effect of adjusting the gas flow rate.

[0008] Preferably, the end of the adjusting plug is provided with a connecting slot, and the transmission connecting rod is in sliding connection with the connecting slot, and the connecting slot serves as a connection between the adjusting plug and the transmission connecting rod.

[0009] Preferably, the end of the transmission connecting rod is provided with a slot, and a plug rod is fixedly connected in the slot, and the plug rod and the slot are matched, and the plug rod and the slot can improve the connection stability between the adjusting plug and the transmission connecting rod.

[0010] Preferably, the inner wall of the adjusting hole is provided with a threaded groove, and the mounting cap is in threaded connection with the adjusting hole, and the adjusting hole provides stable support for the installation of the flow limiting mechanism.

[0011] Preferably, the top surface of the flowmeter body is fixedly connected with a measuring inner tube, and the measuring inner tube is movably connected with a measuring float, and the measuring float can be lifted by the pushing of the gas.

[0012] Preferably, the top surface of the flowmeter body is fixedly connected with an observation outer tube, and the observation outer tube is provided with observation scale lines on the outer surface, and the observation scale lines facilitate the observation of the displacement change of the measuring float by the staff.

[0013] The utility model provides a high pressure gas flowmeter with flow limiting device, and has the beneficial effects as follows:

[0014] 1. The utility model discloses a adjusting handle, adjusting plug, mounting cap and connecting slot are set up, and the connecting and cooperating relation between adjusting plug and transmission connecting rod makes the adjusting handle rotate can drive adjusting plug to rotate, thereby adjusting the air flow speed in the device, is favorable to the control of the flow rate of gas in the device, and the transmission connecting rod is taken down from the device through the adjusting handle, can play the protection effect to the adjusting mechanism, effectively prevents other personnel from adjusting the gas flow in the device at will, to avoid the gas waste caused by the welding worker to adjust the flow at will, influence welding forming quality.

[0015] 2. The utility model discloses the setting of measuring inner tube, measuring float and observation outer tube, and the staff can measure the flow rate of gas according to the height and time of measuring float, and the motion state of measuring float is observed and recorded by the staff, and the setting of stainless steel powder metallurgy filter element and bowl filter screen can filter the impurities in the gas pipeline, avoid the impurities along with gas and flow to the flowmeter body and measuring inner tube, and influence the normal use of the device. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is the whole structure schematic diagram of the utility model;

[0017] Figure 2Partial structure split drawing of the utility model;

[0018] Figure 3 Partial sectional view of flowmeter main body of the utility model;

[0019] Figure 4 Structure schematic view of flow limiting mechanism of the utility model;

[0020] Figure 5 Internal structure schematic view of air inlet pipeline of the utility model.

[0021]

Main component symbol explanation

[0022] 1, flowmeter main body;2, connecting screw;3, air inlet pipeline;4, stainless steel powder metallurgy filter element;5, bowl-shaped filter screen;6, adjusting hole;

[0023] 7, flow limiting mechanism;701, adjusting handle;702, adjusting plug;703, transmission connecting rod;704, mounting cap;705, connecting slot;

[0024] 8, measuring inner tube;9, measuring float;10, observation outer tube;11, observation scale line. Specific implementation

[0025] The utility model embodiment provides a kind of high-pressure gas flowmeter with flow limiting device.

[0026] Please refer to Figure 1 、 Figure 2 And Figure 3 , including flowmeter main body 1, the air inlet pressure reference of the flow scale of the device is set to 0.35~0.6MPa when producing flowmeter, according to flow calculation formula Q=PV / QT, if the reference of the design of gas flowmeter scale is basically the highest pressure 0.55MPa, then the air inlet pressure of the device is controlled at 0.5~0.55MPa, then the output flow of flowmeter and scale are basically consistent, this can accurately measure high-pressure gas, solve the problem that flowmeter scale reference pressure setting is chaotic, air inlet pipeline pressure setting is high and welder shielding gas flow is randomly adjusted.

[0027] Please refer to Figure 1 And Figure 2The top surface of the flowmeter body 1 is fixedly connected with a measuring inner tube 8, the inside of the measuring inner tube 8 is movably connected with a measuring float 9, the material of the measuring float 9 is a plastic material with low density, and the inside is designed as a hollow structure, and the self-gravity is low. After the gas enters the flowmeter body 1 through the gas inlet pipeline 3, the gas will push the measuring float 9 to float up under the action of the pressure, and the working personnel can measure the flow speed of the gas according to the height and time of the floating of the measuring float 9. The measuring float 9 and the measuring inner tube 8 have good airtightness, so that the gas cannot pass through the gap between the two to pass the measuring float 9, and finally affect the measurement accuracy of the device.

[0028] The top surface of the flowmeter body 1 is fixedly connected with an observation outer tube 10, the outer surface of the observation outer tube 10 is provided with an observation scale line 11, and the measuring inner tube 8 and the observation outer tube 10 are made of hard glass. The working personnel can observe the displacement change of the measuring float 9 in the measuring inner tube 8 through the observation outer tube 10 and the measuring inner tube 8, and through the setting of the observation scale line 11, the working personnel can easily master the displacement degree of the measuring float 9, thereby facilitating the measurement of the flow speed of the gas.

[0029] The bottom surface of the flowmeter body 1 is fixedly connected with a connecting screw rod 2, the outer thread of the connecting screw rod 2 is threadedly connected with a gas inlet pipeline 3, the inside of the gas inlet pipeline 3 is fixedly installed with a stainless steel powder metallurgy filter element 4 and a bowl-shaped filter screen 5. Through the setting of the connecting screw rod 2, the gas inlet pipeline 3 can be conveniently installed and disassembled. The stainless steel powder metallurgy filter element 4 and the bowl-shaped filter screen 5 installed in the gas inlet pipeline 3 can filter the impurities in the gas pipeline, so that the impurities do not flow into the flowmeter body 1 and the measuring inner tube 8 together with the gas, thereby avoiding affecting the normal use of the device. The flowmeter body 1, the stainless steel powder metallurgy filter element 4 and the bowl-shaped filter screen 5 are all prior art, and will not be described in detail in this application.

[0030] Please refer to Figure 2 and Figure 3 The inside of the flowmeter body 1 is provided with an adjusting hole 6, the inner wall of the adjusting hole 6 is provided with a threaded groove, and the adjusting hole 6 is threadedly connected with an installation cap 704. Through the setting of the adjusting hole 6 and the installation cap 704, the flow limiting mechanism 7 can be conveniently fixed into the flowmeter body 1. Since the thread has self-locking property, when the flow limiting mechanism 7 is fixed in the flowmeter body 1, the stability of the flow limiting mechanism 7 can be maintained, thereby facilitating the subsequent adjustment of the flow speed of the gas in the flowmeter body 1 through the flow limiting mechanism 7.

[0031] Please refer to Figure 1 , Figure 3 and Figure 4, the inside of the flowmeter body 1 is provided with a flow limiting mechanism 7, the flow limiting mechanism 7 includes an adjusting handle 701 and an adjusting plug 702, through the setting of the flow limiting mechanism 7, the user can adjust the flow rate of the gas in the flowmeter body 1 by rotating the adjusting handle 701, the outer end surface of the adjusting handle 701 is treated with friction, which can increase the friction of the adjusting handle 701 and reduce the probability of hand slip when the user rotates the adjusting handle 701, and the rotation of the adjusting handle 701 can provide power for the rotation of the adjusting plug 702.

[0032] Please refer to Figure 3 and Figure 4 , the adjusting plug 702 rotates in the inside of the flowmeter body 1, the inside of the adjusting plug 702 is provided with an adjusting channel, the adjusting plug 702 and the flowmeter body 1 have good airtightness, when the adjusting channel in the adjusting plug 702 and the gas channel in the flowmeter body 1 are in the same direction, the gas can flow in the inside of the flowmeter body 1, when the adjusting plug 702 rotates, the relative position of the adjusting channel and the gas channel can be changed, so that the space of the gas flow is changed, and then the speed of the gas passing through is adjusted, the adjusting plug 702 and the flowmeter body 1 have a large friction, which can make the adjusting plug 702 keep stable with the flowmeter body 1 without external force, and avoid the adjusting plug 702 from rotating to change the gas flow rate in the device under the flow of the gas.

[0033] The outer surface of the adjusting handle 701 is fixedly connected with a transmission connecting rod 703, the outer surface of the transmission connecting rod 703 is slidably connected with a mounting cap 704, the worker first threadedly connects the mounting cap 704 to the inside of the adjusting hole 6, the mounting cap 704 has a certain protection effect, when the mounting cap 704 is installed, if the worker wants to adjust the gas flow rate in the device, the end of the transmission connecting rod 703 can be inserted into the connecting slot 705 for adjustment, when the adjustment is completed, the transmission connecting rod 703 can be pulled out of the connecting slot 705 through the adjusting handle 701, which can effectively prevent others from adjusting the gas flow rate in the device at will.

[0034] The end of the adjusting plug 702 is provided with a connecting slot 705, the transmission connecting rod 703 is slidably connected with the connecting slot 705, the end of the transmission connecting rod 703 is provided with a slot, the connecting slot 705 is fixedly connected with a plug rod in the inside, the slot and the plug rod are matched, when the transmission connecting rod 703 is slidably inserted into the inside of the connecting slot 705, the plug rod on the inner wall of the connecting slot 705 is inserted into the slot on the surface of the transmission connecting rod 703, at this time, the transmission connecting rod 703 and the adjusting plug 702 can keep relatively stable, when the worker rotates the adjusting handle 701, the transmission connecting rod 703 can drive the adjusting plug 702 to rotate, so as to adjust the gas flow rate in the device.

[0035] Working principle: when the staff measures the gas flow by using the application, first set the gas pressure reference of the flow scale of the flowmeter to 0.35-0.60MPa, then install the installation cap 704 into the adjusting hole 6 by rotating the installation cap 704, after the installation cap 704 is installed, insert the transmission connecting rod 703 into the installation cap 704, make the insertion slot at the end of the transmission connecting rod 703 and the insertion rod inside the connecting insertion slot 705 be inserted, realize the fixation between the adjusting plug 702 and the transmission connecting rod 703 through the insertion rod and the insertion slot, then rotate the adjusting handle 701, the adjusting handle 701 can drive the adjusting plug 702 to rotate through the transmission connecting rod 703, the adjusting plug 702 can adjust the size of the gas flowing space inside the flowmeter main body 1, so as to adjust the flow rate of the gas, make the gas pressure reference of the flow scale of the flowmeter to 0.35-0.60MPa, then pull out the adjusting handle 701 from the installation cap 704, so as to prevent other staff from adjusting the gas flow, then connect the gas inlet pipeline 3 below the device with the high-pressure gas channel, after the gas enters into the flowmeter main body 1, the measuring float 9 will be pushed to float inside the measuring inner tube 8, the staff can read the corresponding scale on the surface of the observation outer tube 10 according to the position of the measuring float 9, finally, the flow of the gas can be measured according to the scale and the time.

[0036] The basic principle and main features of the application and the advantages of the application are shown and described above. It should be understood by the skilled in the art that the application is not limited by the above examples, and the above examples and descriptions in the specification are only to illustrate the principle of the application. Without departing from the spirit and scope of the application, the application can have various changes and improvements, and these changes and improvements all fall within the scope of the claimed application. The scope of protection of the application is defined by the appended claims and their equivalents.

Claims

1. A high pressure gas flowmeter with flow restriction device comprising a flowmeter body (1) characterised in that: The bottom surface of the flow meter body (1) is fixedly connected to a connecting screw (2), and the external thread of the connecting screw (2) is connected to an air inlet pipe (3). A stainless steel powder metallurgy filter element (4) and a bowl-shaped filter screen (5) are fixedly installed inside the air inlet pipe (3). An adjustment hole (6) is opened inside the flow meter body (1), and a flow limiting mechanism (7) is set inside the flow meter body (1). The flow limiting mechanism (7) includes an adjusting handle (701) and an adjusting stop (702). A transmission connecting rod (703) is fixedly connected to the outer surface of the adjusting handle (701), and an installation cap (704) is slidably connected to the outer surface of the transmission connecting rod (703).

2. A high pressure gas flow meter with flow restriction device according to claim 1, characterized in that: The adjusting valve (702) rotates inside the flow meter body (1), and an adjusting channel is provided inside the adjusting valve (702).

3. A high-pressure gas flow meter with a flow limiting device according to claim 1, characterized in that: The end of the adjusting valve (702) is provided with a connecting slot (705), and the transmission connecting rod (703) is slidably connected to the connecting slot (705).

4. A high-pressure gas flow meter with a flow limiting device according to claim 3, characterized in that: The end of the transmission connecting rod (703) is provided with a slot, and a plug rod is fixedly connected inside the connecting slot (705). The slot and the plug rod are compatible.

5. A high-pressure gas flow meter with a flow limiting device according to claim 1, characterized in that: The inner wall of the adjustment hole (6) is provided with a threaded groove, and the mounting cap (704) is threadedly connected to the adjustment hole (6).

6. A high-pressure gas flow meter with a flow limiting device according to claim 1, characterized in that: The top surface of the flowmeter body (1) is fixedly connected to a measuring inner tube (8), and a measuring float (9) is movably connected inside the measuring inner tube (8).

7. A high-pressure gas flow meter with a flow limiting device according to claim 1, characterized in that: The top surface of the flowmeter body (1) is fixedly connected to an observation outer tube (10), and the outer surface of the observation outer tube (10) is provided with observation scale lines (11).

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