A water jacket cover for gas cylinder water pressure test

Abstract

The present invention relates to the field of gas cylinder inspection and testing, and discloses a water jacket cover for gas cylinder hydrostatic testing, comprising a water jacket cover body for connecting to a water jacket, a piston chamber provided in the water jacket cover body, a piston slidably connected in the piston chamber, a hollow high-pressure rod fixedly penetrated through the piston, both ends of the high-pressure rod extending out of the water jacket cover body, a through hole provided at the bottom of the water jacket cover body, a hollow gas cylinder connector fixed in the through hole, the gas cylinder connector slidably sleeved on the high-pressure rod, and a tapered thread provided at the bottom of the gas cylinder connector for matching the gas cylinder nozzle, a flange provided in an annular manner at the bottom of the high-pressure rod, a gas cylinder sealing ring capable of expanding outwardly abutting the flange against the bottom of the gas cylinder connector; an annular air bag provided on the side of the water jacket cover body, the air bag being connected to the piston chamber. The present invention can solve the sealing problem between the water jacket cover and the water jacket.

Description

Technical Field

[0001] The invention relates to the technical field of gas cylinder inspection and detection, in particular to a water jacket cover for a gas cylinder water pressure test. Background Art

[0002] During the manufacturing and use of gas cylinders, it is very important to ensure the safety of the cylinders. As an important link in the production and inspection process of gas cylinders, the water pressure test plays an important role in verifying whether the overall strength of the gas cylinders meets the requirements. The most common water pressure test method at present is the external measurement method, which is to fill the gas cylinder with water, hoist it into a water-filled water jacket, and seal the water jacket with a water jacket cover. By pressurizing the gas cylinder to the water pressure test pressure, the gas cylinder expands and squeezes out the excess water in the water jacket. The volume of water overflowing from the water jacket is recorded. After that, the pressure is maintained to observe whether there is any change in the water volume and whether the pressure drops. Then the pressure is reduced and the remaining water volume is recorded. At this point, the water pressure test is completed. Because the time for pressurization, pressure maintenance, and pressure reduction is fixed, the lifting and sealing of the water jacket cover determines the efficiency of the entire water pressure test.

[0003] Patent CN201911153060.6 discloses a water jacket cover for hydrostatic testing of gas cylinders. This cover uses a compressed elastic sealing ring to quickly mate with the cylinder mouth, significantly improving installation efficiency. However, it does not address the sealing issue between the water jacket cover and the water jacket. Summary of the Invention

[0004] In view of this, an object of the present invention is to provide a water jacket cover for a gas cylinder water pressure test, which can solve the sealing problem between the water jacket cover and the water jacket.

[0005] The present invention solves the above technical problems through the following technical means:

[0006] A water jacket cover for a gas cylinder water pressure test comprises a water jacket cover body for connecting to a water jacket, a piston cavity being provided in the water jacket cover body, a piston being slidably connected in the piston cavity, a hollow high-pressure rod being fixedly penetrated by the piston, both ends of the high-pressure rod extending out of the water jacket cover body, a through hole being provided at the bottom of the water jacket cover body, a hollow gas cylinder connecting head being fixed in the through hole, the gas cylinder connecting head being slidably sleeved on the high-pressure rod, and a tapered thread for matching with the mouth of the gas cylinder being provided at the lower part of the gas cylinder connecting head, a flange being annularly provided at the bottom of the high-pressure rod, a gas cylinder sealing ring capable of expanding outward being abutted between the flange and the bottom of the gas cylinder connecting head; an annular air bag being provided at the side of the water jacket cover body, the air bag being connected to the piston cavity.

[0007] Furthermore, a spring is wound around the high-pressure rod in the piston cavity, one end of the spring is fixed on the piston, and the other end is fixed on the top wall of the piston cavity.

[0008] Furthermore, a weight-reducing cavity is provided in the water jacket cover body.

[0009] Furthermore, the airbag is connected to an inflation tube, one end of the inflation tube is located in the weight-reducing cavity, and the other end extends out of the water jacket cover body.

[0010] Furthermore, the high-pressure rod and the air intake pipe are both provided with quick-release connectors at one end located above the water jacket cover body.

[0011] Furthermore, a piston sealing ring is provided on the side of the piston.

[0012] Furthermore, the gas cylinder connector and the water jacket cover body are connected via a flat key.

[0013] Furthermore, a mounting portion for resting against the bottom wall of the piston cavity is provided on the top of the gas cylinder connecting head.

[0014] Furthermore, a first connector sealing ring is provided between the mounting portion of the gas cylinder connector and the bottom wall of the piston chamber, a second connector sealing ring and a third connector sealing ring are provided between the gas cylinder connector and the sliding surface of the high-pressure rod, the second connector sealing ring and the third connector sealing ring are respectively located at the head and tail of the gas cylinder connector, and a sealing gasket is provided between the gas cylinder connector and the bottom of the water jacket cover body, the gas cylinder connector cover is provided with a connector mounting nut, and the sealing gasket rests between the connector mounting nut and the bottom of the water jacket cover body.

[0015] The principle of the present invention is:

[0016] First, the gas cylinder connector is inserted into the mouth of the gas cylinder, and then the water jacket cover body is rotated so that the tapered thread at the bottom of the gas cylinder connector fits with the mouth of the gas cylinder. Then, the entire water jacket cover and the gas cylinder are hoisted into the water jacket, and then the water jacket cover body is fixedly connected to the water jacket. At this time, the airbag is inflated, and the airbag expands, forming a seal between the water jacket cover body and the water jacket. At the same time, because the airbag is connected to the piston chamber, the gas in the airbag will also enter the piston chamber, squeezing the piston in the piston chamber, causing the piston to rise. The piston is fixed to the high-pressure rod, and the piston drives the high-pressure rod to rise as well. The flange at the bottom of the high-pressure rod rises synchronously, causing the flange at the bottom of the high-pressure rod to press the gas cylinder sealing ring upward, causing the gas cylinder sealing ring to expand outward, and then forming a seal with the inner wall of the gas cylinder mouth and the bottom of the high-pressure rod, thereby achieving rapid cooperation between the water jacket cover body and the gas cylinder mouth, greatly improving the efficiency of the water pressure test.

[0017] The beneficial effects of the present invention are:

[0018] (1) The present invention is provided with an air bag and a gas cylinder sealing ring, which can simultaneously realize the sealing between the gas cylinder connector and the water jacket cover and the sealing between the water jacket cover and the water jacket, thereby solving the problem that the traditional water jacket cover and the water jacket cannot be sealed. In addition, only one action of inflating the air bag is required to pre-tighten the gas cylinder sealing ring and the air bag at the same time. The operation is simple, and compared with the traditional mechanical pre-tightening gas cylinder sealing ring, the workload is reduced and the assembly is faster.

[0019] (2) The present invention is provided with a piston chamber, which can be connected with the air bag on the one hand, driving the piston to rise and fall, thereby driving the gas cylinder connecting head to rise and fall, so that the gas cylinder sealing ring expands, and realizes the rapid matching of the water jacket cover and the gas cylinder mouth. On the other hand, since the water jacket cover is a pure steel structure, it is heavy, the lifting is cumbersome, and the energy consumption is high. The piston chamber can reduce the weight of the entire water jacket cover, which is more conducive to the lifting of the water jacket cover. The weight-reducing chamber can also further reduce the weight of the water jacket cover.

[0020] (3) The high-pressure rod of the present invention is integrally formed. Compared with the traditional high-pressure rod threaded connection, it can effectively prevent foreign matter from falling into the gas cylinder and reduce the work of the staff to observe whether the traditional high-pressure rod threaded connection is tightened or whether it has fallen. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic structural diagram of a water jacket cover for a gas cylinder water pressure test according to the present invention;

[0022] Figure 2 yes Figure 1 Schematic diagram of the enlarged structure of part A in the middle;

[0023] Figure 3 yes Figure 1 Schematic diagram of the enlarged structure of part B in the middle;

[0024] Among them, the water jacket cover body 1, the cover body 2, the screw 3, the weight reduction chamber 4, the airbag 5, the connecting pipe 50, the piston chamber 6, the piston 7, the piston sealing ring 70, the quick connector 8, the spring seat 9, the spring 10, the guide ring 12, the high-pressure rod 13, the gas cylinder connector 14, the mounting part 15, the first connector sealing ring 16, the flat key 17, the second connector sealing ring 18, the third connector sealing ring 19, the flange 20, the gas cylinder sealing ring 21, the connector mounting nut 22, the sealing gasket 23, and the inflation tube 24. DETAILED DESCRIPTION

[0025] The following describes the embodiments of the present invention through specific embodiments. Those skilled in the art can understand the advantages and effects of the present invention from the contents disclosed in this specification. It should be noted that the illustrations provided in the following embodiments are for illustrative purposes only and are only schematic diagrams, not actual drawings. They should not be understood as limiting the present invention. In order to better illustrate the embodiments of the present invention, some parts in the figures may be omitted, enlarged or reduced, and do not represent the dimensions of the actual product. It is understandable to those skilled in the art that some well-known structures and their descriptions may be omitted in the figures.

[0026] The same or similar numbers in the figures of the embodiments of the present invention correspond to the same or similar parts. In the description of the present invention, it should be understood that if the terms "up", "down", "left", "right", "front", "back", etc. indicate the orientation or position relationship, they are based on the orientation or position relationship shown in the figure. This is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation. Therefore, the terms describing the position relationship in the figures are only used for illustrative purposes and cannot be understood as limiting the present invention. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0027] like Figure 1 As shown, the present invention discloses a water jacket cover for a gas cylinder hydrostatic test, comprising a water jacket cover body 1 for connecting to a water jacket. A cover body 2 is mounted on top of the water jacket cover body 1 via screws 3. Cover body 2 is used to seal the water jacket cover body 1. A piston chamber 6 and a weight-reducing chamber 4 are provided within the water jacket cover body 1. The piston chamber 6 is located inside the weight-reducing chamber 4 and is cylindrical in shape, while the weight-reducing chamber 4 is an annular chamber. As can be seen from the figure, cover body 2 also consists of two parts, one of which covers the piston chamber 6 and the other covers the weight-reducing chamber 4.

[0028] Combine Figure 1 and Figure 3 As shown, an annular airbag 5 is mounted on the side of the water jacket cover body 1. A connecting pipe 50 connects the airbag 5 to the piston chamber 6. Connecting pipe 50 connects to an inflation tube 24. One end of inflation tube 24 is located in the weight-reducing chamber 4, and the other end extends out of the water jacket cover body 1 and is located outside the cover body 2. A quick-release connector 8 is installed on the end of inflation tube 24 outside the cover body 2 to facilitate inflation of inflation tube 24.

[0029] Recombination Figure 2 As shown, a piston 7 is slidably connected in the piston chamber 6, and a piston sealing ring 70 is clamped on the side of the piston 7. A hollow high-pressure rod 13 is fixedly passed through the middle of the piston 7. Both ends of the high-pressure rod 13 extend out of the water jacket cover body 1. A quick-release connector 8 is also installed on the end of the high-pressure rod 13 located above the water jacket cover body 1. A spring seat 9 is integrally formed in the middle of the part of the cover body 2 covering the piston chamber 6. The high-pressure rod 13 passes through the spring seat 9 and can slide on the spring seat 9. A spring 10 is wound around the high-pressure rod 13 in the piston chamber 6. One end of the spring 10 is fixed to the piston 7 and the other end is fixed to the top wall of the piston chamber 6 (i.e., the spring seat 9).

[0030] A through hole is provided at the bottom of the water jacket cover body 1, in which a hollow gas cylinder connector 14 is fixed via a flat key 17. The flat key 17 is used to connect the gas cylinder connector 14 to the water jacket cover body 1, which can transmit torque more efficiently and stably. The gas cylinder connector 14 is slidably sleeved on the high-pressure rod 13, and the lower portion of the gas cylinder connector 14 is provided with a tapered thread for matching the gas cylinder bottle mouth. The top of the gas cylinder connector 14 is integrally formed with a mounting portion 15 for resting on the bottom wall of the piston chamber 6. When the gas cylinder connector 14 is installed, the gas cylinder connector 14 is passed through the through hole at the bottom of the water jacket cover body 1, and the mounting portion 15 rests on the bottom wall of the piston chamber 6. A straight thread is provided in the middle of the gas cylinder connector 14, and the gas cylinder connector 14 is installed and fixed by tightening the connector mounting nut 22 on the straight thread of the gas cylinder connector 14. In order to improve the sealing performance at the through hole at the bottom of the water jacket cover body 1, a sealing gasket 23 is installed between the connector mounting nut 22 and the bottom of the water jacket cover body 1, and a first connector sealing ring 16 is provided between the mounting portion 15 of the gas cylinder connector 14 and the bottom wall of the piston chamber 6. A flange 20 is provided in an annular shape at the bottom of the high-pressure rod 13. A gas cylinder sealing ring 21 capable of expanding outward is abutted between the flange 20 and the bottom of the gas cylinder connector 14. The gas cylinder sealing ring 21 is made of elastic rubber material. In order to prevent liquid from entering the piston chamber 6 when the gas cylinder sealing ring 21 is not expanded, a second connector sealing ring 18 and a third connector sealing ring 19 are provided between the sliding surfaces of the gas cylinder connector 14 and the high-pressure rod 13. The second connector sealing ring 18 and the third connector sealing ring 19 are respectively located at the head and tail of the gas cylinder connector 14.

[0031] Before installing the water jacket cover of the present invention, the gas cylinder connector 14 is first inserted into the bottle mouth of the gas cylinder, and then the water jacket cover body 1 is rotated. The water jacket cover body 1 drives the gas cylinder connector 14 to rotate together through the flat key 17, so that the tapered thread at the lower part of the gas cylinder connector 14 is matched with the bottle mouth of the gas cylinder. Then the entire water jacket cover and the gas cylinder can be hoisted into the water jacket together, and then the water jacket cover body 1 is fixedly connected to the water jacket. At this time, by inflating the inflation tube 24, the airbag 5 expands, so that a seal is formed between the water jacket cover body 1 and the water jacket. At the same time, the gas in the inflation tube 24 will also enter the piston cavity 6 below the piston 7, squeezing the piston 7 in the piston cavity 6, causing the piston 7 to rise. Since the piston 7 is fixed to the high-pressure rod 13, the piston 7 drives the high-pressure rod 13 to rise along the water jacket cover body 1, and the flange 20 at the bottom of the high-pressure rod 13 rises synchronously, so that the flange 20 at the bottom of the high-pressure rod 13 squeezes the gas cylinder sealing ring 21 upward, and the gas cylinder sealing ring 21 expands outward, thereby forming a seal with the inner wall of the gas cylinder nozzle and the bottom of the high-pressure rod 13, thereby achieving rapid cooperation between the water jacket cover body 1 and the gas cylinder nozzle, greatly improving the efficiency of the water pressure test.

[0032] The present invention is provided with an air bag 5 and a gas cylinder sealing ring 21, which can simultaneously achieve sealing between the gas cylinder connector 14 and the water jacket cover and sealing between the water jacket cover and the water jacket, solving the problem that the traditional water jacket cover and the water jacket cannot be sealed. In addition, only one action of inflating the air bag 5 is required to pre-tighten the gas cylinder sealing ring 21 and the air bag 5 at the same time. The operation is simple. Compared with the traditional mechanical pre-tightening gas cylinder sealing ring 21, the workload is reduced and the assembly is faster.

[0033] The present invention is provided with a piston chamber 6, which on the one hand can be connected with the airbag 5, driving the piston 7 to rise and thereby driving the gas cylinder connecting head 14 to rise, so that the gas cylinder sealing ring 21 expands, thereby realizing the rapid matching of the water jacket cover and the gas cylinder bottle mouth. On the other hand, since the water jacket cover is a pure steel structure, it is heavy, the lifting is cumbersome, and the energy consumption is high. The piston chamber 6 is a cavity, which can reduce the weight of the entire water jacket cover and is more conducive to the lifting of the water jacket cover. The weight reduction chamber 4 can also further reduce the weight of the water jacket cover.

[0034] The high-pressure rod 13 of the present invention is integrally formed. Compared with the traditional high-pressure rod 13 threaded connection, it can effectively prevent foreign matter from falling into the gas cylinder and reduce the work of workers to observe whether the traditional high-pressure rod 13 threaded connection is tight or whether it has fallen.

[0035] The above embodiments are intended only to illustrate the technical solutions of the present invention and are not intended to limit the scope of the present invention. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art will appreciate that the technical solutions of the present invention may be modified or replaced with equivalents without departing from the spirit and scope of the technical solutions of the present invention, and such modifications or equivalents shall be encompassed by the claims of the present invention. Any techniques, shapes, and structures not described in detail herein are well known.

Claims

1. A water jacket cover for a gas cylinder hydrostatic test, comprising a water jacket cover body for connecting to a water jacket, characterized in that: A piston cavity is provided in the water jacket cover body, a piston is slidably connected in the piston cavity, a hollow high-pressure rod is fixedly penetrated on the piston, both ends of the high-pressure rod extend out of the water jacket cover body, a through hole is provided at the bottom of the water jacket cover body, a hollow gas cylinder connector is fixed in the through hole, the gas cylinder connector is slidably sleeved on the high-pressure rod, and the lower part of the gas cylinder connector is provided with a tapered thread for matching the mouth of the gas cylinder, a flange is annularly provided at the bottom of the high-pressure rod, and a gas cylinder sealing ring that can expand outward is abutted between the flange and the bottom of the gas cylinder connector; an annular air bag is provided on the side of the water jacket cover body, and the air bag is communicated with the piston cavity; The top of the gas cylinder connector is provided with a mounting portion for abutting against the bottom wall of the piston cavity; A first connector sealing ring is provided between the mounting portion of the gas cylinder connector and the bottom wall of the piston chamber, a second connector sealing ring and a third connector sealing ring are provided between the gas cylinder connector and the sliding surface of the high-pressure rod, the second connector sealing ring and the third connector sealing ring are respectively located at the head and tail of the gas cylinder connector, and a sealing gasket is provided between the gas cylinder connector and the bottom of the water jacket cover body, the gas cylinder connector cover is provided with a connector mounting nut, and the sealing gasket abuts between the connector mounting nut and the bottom of the water jacket cover body; The high-pressure rod is wound with a spring in the piston cavity, one end of the spring is fixed on the piston, and the other end is fixed on the top wall of the piston cavity; A weight-reducing cavity is provided in the water jacket cover body; The air bag is connected with an inflation tube, one end of the inflation tube is located in the weight reduction cavity, and the other end extends out of the water jacket cover body.

2. The water jacket cover for gas cylinder hydrostatic testing according to claim 1, characterized in that: The high-pressure rod and the air inlet pipe are both provided with quick-release joints at one end located above the water jacket cover body.

3. The water jacket cover for gas cylinder hydrostatic testing according to claim 1, characterized in that: A piston sealing ring is provided on the side of the piston.

4. The water jacket cover for gas cylinder hydrostatic testing according to claim 1, characterized in that: The gas cylinder connector and the water jacket cover body are connected via a flat key.

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