Air chamber assembly of drilling pump

Abstract

The invention provides a drilling pump air chamber assembly, and relates to the technical field of drilling pumps, the drilling pump air chamber assembly comprises a shell assembly, the shell assembly comprises a shell and a gland, the shell is internally provided with a cavity, and the gland is installed at an opening part at the top end of the shell in a matched mode. The buffering mechanism is connected between the gland and the air bag, the gland serves as a supporting base body of the buffering mechanism, when the conveying pipeline conveys high-pressure fluid and the internal pressure of the conveying pipeline is too large, the conveyed fluid extrudes the outer wall of the air bag to compress the air bag, and when the internal pressure of the conveying pipeline is reduced, high-pressure gas in the air bag enables the air bag to rebound; and the middle of the deformation part of the air bag is buffered and supported through the buffering mechanism, the severe impact caused by the deformation middle part of the air bag is avoided, the huge impact force borne by the deformation middle part of the air bag is relieved, and the service life of the air bag is prolonged.

Description

Technical Field

[0001] The invention relates to the technical field of drilling pumps, in particular to an air bag assembly of a drilling pump. Background Art

[0002] The drilling pump is also called "mud pump". Its main functions include transporting mud and flushing fluid, fixing the well wall and driving drilling and recovering cuttings during drilling and well drilling. An air bag assembly is installed in the pressure stabilizing chamber of the drilling pump. The air bag assembly is usually composed of a shell, a rubber core (commonly known as an air bag), a gland, a pressure gauge, an angle stop valve and other components. The mud pump stabilizes the pressure of the mud output through the compression and expansion of the air bag. In drilling production, it is very important to maintain the normal operation of the air bag.

[0003] The interior of the rubber core in the existing drilling pump air bag assembly is a hollow cavity. Since the pressure of the drilling pump changes during the process of conveying mud and flushing fluid, the rubber core needs to expand and compress repeatedly. The middle part of the rubber core repeatedly deforms during expansion and compression, and the impact force on the deformed middle part of the rubber core is the greatest. The long-term repeated huge deformation impact force on the deformed middle part of the rubber core causes the middle part of the rubber core to rupture, thereby reducing the overall service life of the device. Summary of the invention

[0004] The purpose of the present invention is to provide a drilling pump air bag assembly, which can prevent the middle part of the rubber core from being subjected to huge deformation impact force and prolong the service life of the drilling pump air bag assembly.

[0005] On the one hand, to achieve the above-mentioned purpose, the present invention provides a drilling pump air bag assembly, including a shell assembly, the shell assembly including an outer shell and a gland, the interior of the outer shell is provided with a cavity, the gland is matched with an opening portion installed on the top of the outer shell, the gland is connected through a plurality of connecting rods, and the outer shell and the gland are connected by a plurality of connecting rods; an air bag assembly, the air bag assembly including an airbag, the airbag is arranged in the inner cavity of the outer shell, the open end of the airbag is arranged between the outer shell and the gland, a buffer mechanism is installed between the airbag and the gland, and the buffer mechanism is used to buffer the impact force of the deformation of the airbag.

[0006] In the present invention, a buffer mechanism is connected between the pressure cover and the airbag, and the buffer mechanism is used to provide buffer support in the middle of the deformed part of the airbag to avoid severe impact on the middle part of the deformed airbag, reduce the huge impact force on the middle part of the deformed airbag, extend the service life of the airbag, and reduce the risk of rupture caused by the large impact force on the middle part of the airbag.

[0007] As a further solution of the present invention: the buffer mechanism includes a mounting plate and a buffer spring, the mounting plate is fixed to the bottom end of the gland, the bottom end of the mounting plate is connected to a buffer spring, the other end of the buffer spring is connected to the middle of the airbag, and the buffer spring is used to buffer the impact force of the deformation of the middle part of the airbag. Beneficial effect: when the airbag rebounds and deforms, the buffer spring stretches, and the elongation tension of the buffer spring buffers the rebound deformation of the airbag, avoiding the middle part of the airbag from being deformed quickly, thereby reducing the large deformation impact force on the middle part of the airbag, reducing the huge impact force on the middle part of the airbag deformation, extending the service life of the airbag, and reducing the risk of rupture caused by the large impact force on the middle part of the airbag.

[0008] As a further solution of the present invention: the buffer spring is a conical spring, the small end of the buffer spring is connected to the airbag, and the large end of the buffer spring is connected to the mounting plate. Beneficial effects: the small end of the conical buffer spring is matched and connected to the airbag, and the conical buffer spring provides stable support to avoid the buffer spring from deflecting during use, and the support effect is good. At the same time, the conical buffer spring has a larger compression space when compressed to avoid affecting the compression of the airbag.

[0009] As a further solution of the present invention: it also includes a locking assembly, which is installed between the shell and the gland, and is used to lock the connecting rod. The locking assembly includes a locking shell, which is a hollow annular cylinder, and a plurality of mounting grooves are arranged on the locking shell. The connecting rod is installed in the mounting groove through and through, and a locking rod is installed in the mounting groove for movable limit, and a reset spring is connected to the locking rod, and one end of the reset spring is contacted and connected in the mounting groove. The locking rod extends inside the locking shell and is welded with a resistance column at one end, and the inside of the locking shell is connected with an annular rubber tube, and the rubber tube is in resistance to the resistance column, and the rubber tube is installed between the shell and the gland, and a locking mechanism is installed at the other end of the locking rod, and the locking mechanism is used to clamp and lock the connecting rod. Beneficial effect: The locking mechanism automatically locks multiple connecting rods. When a worker mistakenly operates the connecting rod with the knob connection function, the locking mechanism locks the connecting rod, and the knob cannot be disassembled, thereby avoiding the mistaken disassembly operation caused by high-pressure gas inside the device, making the device safer during maintenance and improving safety performance.

[0010] As a further solution of the present invention: the locking mechanism includes a locking plate, a plurality of limiting holes are arranged in the locking plate, and abutting contact springs and elastic rods are installed in the limiting holes, wherein the elastic rod is closer to the connecting rod relative to the conflict spring, and the plurality of elastic rods are used to clamp and lock the connecting rod. Beneficial effect: when the plurality of elastic rods conflict with the connecting rod, a locking groove matching the outer shape of the connecting rod 1 is formed on the side of the plurality of elastic rods away from the conflict spring, so as to increase the contact area with the conflicting connecting rod and improve the locking efficiency of the connecting rod.

[0011] As a further solution of the present invention: the elastic rod is a cylindrical rod, and a plurality of the elastic rods are arranged on the same vertical plane. Beneficial effect: the elastic rods of the plurality of cylindrical rods are adaptively connected to the connecting rod, and the plurality of elastic rods on the same vertical plane are adaptively contacted with the connecting rod, the contact surface is large, and the adaptive locking effect is good.

[0012] As a further solution of the present invention: the connecting rod has a locking portion with an equilateral hexagonal cross section and a screw portion with a threaded arrangement, the locking portion is installed through the gland and is installed through the installation groove, the screw portion is threadedly connected in the housing, and a plurality of the elastic rods are clamped and locked to the locking portion. Beneficial effect: when the locking portion with a hexagonal cross section contacts with a plurality of elastic rods, a plurality of side surfaces can also be adapted to clamp with the elastic rods, and the clamping is stable.

[0013] As a further solution of the present invention: the upper end of the gland is connected with an angle stop valve, and the angle stop valve is used to introduce high-pressure gas. Beneficial effect: the angle stop valve on the gland is used to connect the high-pressure gas pipe, so that the high-pressure gas pipe can fill the inside of the device with high-pressure gas. After the high-pressure gas is filled, the angle stop valve is closed to maintain the high-pressure gas environment inside the device.

[0014] As a further solution of the present invention: the angle stop valve is connected to a pressure gauge and a pressure relief valve, the pressure gauge is used to display the internal pressure of the device, and the pressure relief valve is used to relieve the pressure inside the device. Beneficial effect: the pressure gauge connected to the angle stop valve directly displays the pressure inside the device, and then observes the overall pressure value inside the device. When the internal pressure of the device decreases, the pressure is supplemented to ensure the normal use of the device. When the internal pressure of the device is too high, the pressure relief valve releases the gas pressure, or when the device needs maintenance, the high-pressure gas inside the airbag is discharged through the pressure relief valve to avoid the existence of high-pressure gas inside the device during maintenance, which may cause maintenance accidents.

[0015] As a further solution of the present invention: the top surface of the gland is connected with a protective cover, the protective cover surrounds and covers the angle stop valve, the pressure gauge and the pressure relief valve, and an opening is arranged on one side of the protective cover, the opening is arranged opposite to the air outlet of the pressure relief valve. Beneficial effect: the internal angle stop valve, the pressure gauge and the pressure relief valve are protected by the protective cover connected to the gland.

[0016] On the second aspect, a method for using a drilling pump air bag assembly is also provided, which is applied to any of the above-mentioned drilling pump air bag assembly devices, wherein the shell assembly is installed on the conveying pipeline, the connecting end at the bottom of the shell is connected to the conveying pipeline, and the pressure cover on the shell is connected to the outer shell by a connecting rod to form a sealed cavity; the air bag assembly is installed in the cavity inside the shell, and the airbag is installed in the cavity, and the airbag is filled with high-pressure gas to allow the airbag to adapt to compression and rebound under the pressure in the conveying pipeline, and a buffer mechanism is installed in the airbag, wherein the buffer mechanism is used to buffer the impact force of the deformation of the airbag during the process of the airbag adapting to compression and rebound.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] 1. The present invention connects a buffer mechanism between the gland and the airbag, and the gland serves as a supporting base of the buffer mechanism. When the conveying pipeline conveys high-pressure fluid, when the internal pressure of the conveying pipeline is too large, the conveying fluid is squeezed on the outer wall of the airbag to compress the airbag. When the internal pressure of the conveying pipeline decreases, the high-pressure gas inside the airbag causes it to rebound, thereby balancing the internal pressure of the conveying pipeline, thereby ensuring the internal pressure of the conveying pipeline is balanced. The buffer mechanism is used to provide buffering support in the middle of the deformed part of the airbag to avoid severe impact on the middle part of the deformed airbag, reduce the huge impact force on the middle part of the deformed airbag, extend the service life of the airbag, and reduce the risk of rupture caused by the large impact force on the middle part of the airbag.

[0019] 2. The present invention causes the rubber tube to resist and move after the resistance column is filled with high-pressure gas, and multiple resistance columns and multiple locking rods move laterally synchronously together, thereby driving the locking mechanism to move laterally in the installation groove, so that the locking mechanism locks the connecting rod. When there is still high-pressure gas inside the device, the locking mechanism automatically locks the multiple connecting rods. When a worker mistakenly operates the connecting rod with a knob connection function, the locking mechanism locks the connecting rod, and the knob cannot be disassembled, thereby avoiding mistaken disassembly operations caused by high-pressure gas inside the device, making it safer during device maintenance and improving safety performance.

[0020] 3. The present invention fixes a locking plate at one end of the locking rod, and limits the installation of the elastic rod through a plurality of limit holes in the locking plate. The elastic rod ton provides elastic force through a resistance spring, so that the plurality of elastic rods are popped out at one end of the locking plate. The plurality of elastic rods can rebound. When the plurality of elastic rods that can rebound resist the connecting rod, they adapt to the shape of the connecting rod, so that the plurality of elastic rods form locking grooves of the connecting rod, and the plurality of elastic rods stably lock the connecting rod. The locking effect is good, and the connecting rods of different shapes can be adaptively locked, and the application range is wide. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 A three-dimensional structural diagram of the drilling pump air bag assembly provided by the present invention;

[0022] Figure 2 An exploded structural diagram of the drilling pump air bag assembly provided by the present invention;

[0023] Figure 3 A side view of the drilling pump air bag assembly provided by the present invention;

[0024] Figure 4 For the present invention Figure 3 Sectional view at AA;

[0025] Figure 5 This is a diagram of the connection structure of the clamping member of the present invention;

[0026] Figure 6 This is a diagram of the explosion connection structure of the locking member of the present invention.

[0027] In the figure: 1. Shell assembly; 101. Shell; 102. Gland; 103. Angle stop valve; 104. Pressure gauge; 105. Pressure relief valve; 106. Protective cover; 107. Connecting rod; 1071. Locking part; 1072. Screw part; 2. Air bag assembly; 201. Air bag; 202. Mounting plate; 203. Buffer spring; 3. Locking assembly; 301. Locking shell; 302. Mounting groove; 303. Locking rod; 304. Resistance column; 305. Return spring; 306. Locking plate; 307. Elastic rod; 308. Resistance spring; 309. Rubber tube. DETAILED DESCRIPTION

[0028] In order to make the purpose, technical solutions and advantages of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention. Unless otherwise defined, the technical terms or scientific terms used herein should be understood by people with general skills in the field to which the present invention belongs. "Including" and similar words used in this article mean that the elements or objects appearing before the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects.

[0029] like Figure 1-Figure 6The present invention is shown, and a drilling pump air bag assembly is provided, including a shell component 1 and an air bag component 2. The shell component 1 includes a shell 101 and a gland 102. The shell 101 is provided with a cavity inside. The gland 102 matches the opening portion installed at the top of the shell 101. The gland 102 is connected through a plurality of connecting rods 107. The shell 101 and the gland 102 are connected by a plurality of connecting rods 107. The air bag component 2 includes an air bag 201. The air bag 201 is arranged in the inner cavity of the shell 101. The open end of the air bag 201 is arranged between the shell 101 and the gland 102. A buffer mechanism is installed between the air bag 201 and the gland 102. The buffer mechanism is used to buffer the impact force of the deformation of the air bag 201.

[0030] Specifically, the bottom of the outer shell 101 is connected to the conveying pipeline, and a cavity is provided inside the outer shell 101, and the cavity is used to place the spherical airbag 201. The outer shell 101 and the pressure cover 102 are connected by multiple connecting rods 107. An air inlet is provided at the upper end of the airbag 201, and the air inlet end of the airbag 201 is tightened by the pressure cover 102 and the outer shell 101 to prevent air leakage of the device.

[0031] The airbag 201 is filled with high-pressure gas, and a buffer mechanism is connected between the gland 102 and the airbag 201, and the gland 102 serves as a supporting base of the buffer mechanism. When the conveying pipeline conveys high-pressure fluid, when the pressure inside the conveying pipeline is too high, the conveying fluid is squeezed on the outer wall of the airbag 201, causing the airbag 201 to compress. When the pressure inside the conveying pipeline decreases, the high-pressure gas inside the airbag 201 causes it to rebound, thereby balancing the pressure inside the conveying pipeline, ensuring that the pressure inside the conveying pipeline is balanced, and providing buffer support through the buffer mechanism in the middle of the deformed part of the airbag 201, avoiding severe impact on the middle part of the deformed airbag 201, reducing the huge impact force on the middle part of the deformed airbag 201, extending the service life of the airbag 201, and reducing the risk of rupture caused by the large impact force on the middle part of the airbag 201.

[0032] In the present invention, a buffer mechanism is connected between the pressure cover 102 and the airbag 201, and the buffer mechanism is used to provide buffer support in the middle of the deformed part of the airbag 201 to avoid severe impact on the deformed middle part of the airbag 201, reduce the huge impact force on the deformed middle part of the airbag 201, extend the service life of the airbag 201, and reduce the risk of rupture caused by the large impact force on the middle part of the airbag 201.

[0033] Preferably, Figure 2 and Figure 4As shown, the buffer mechanism includes a mounting plate 202 and a buffer spring 203. The mounting plate 202 is fixed to the bottom end of the pressure cover 102. The bottom end of the mounting plate 202 is connected to the buffer spring 203. The other end of the buffer spring 203 is connected to the middle of the airbag 201. The buffer spring 203 is used to buffer the impact force of the deformation of the middle part of the airbag 201.

[0034] The pressure cover 102 fixes the mounting plate 202, and the mounting plate 202 fixes the buffer spring 203. The other end of the buffer spring 203 is connected to the middle position of the inner wall of the airbag 201. The airbag 201, the buffer spring 203 and the mounting plate 202 are arranged on the same axis.

[0035] When the airbag 201 is squeezed and deformed, the buffer spring 203 is compressed, and the elastic force provided by the buffer spring 203 supports the inner middle part of the airbag 201. When the airbag 201 rebounds and deforms, the buffer spring 203 extends, and the elongation tension of the buffer spring 203 buffers the rebound deformation of the airbag 201, thereby preventing the middle part of the airbag 201 from being deformed rapidly, thereby reducing the large deformation impact force on the middle part of the airbag 201, reducing the huge impact force on the deformed middle part of the airbag 201, extending the service life of the airbag 201, and reducing the risk of rupture caused by the large impact force on the middle part of the airbag 201.

[0036] Preferably, Figure 2 As shown, the buffer spring 203 is a conical spring, the small end of the buffer spring 203 is connected to the airbag 201, and the large end of the buffer spring 203 is connected to the mounting plate 202. The small end of the conical buffer spring 203 is matched and connected to the airbag 201, and the conical buffer spring 203 provides stable support to avoid the buffer spring 203 from deflecting during use, and has a good support effect. At the same time, when the conical buffer spring 203 is compressed, there is a larger compression space to avoid affecting the compression of the airbag 201.

[0037] Preferably, Figure 2 , Figure 4 , Figure 5 and Figure 6As shown, the drilling pump air bag assembly also includes a locking assembly 3, which is installed between the housing 101 and the gland 102, and is used to lock the connecting rod 107. The locking assembly 3 includes a locking shell 301, a rubber tube 309 and a locking rod 303. The locking shell 301 is a hollow annular cylinder, and a plurality of mounting grooves 302 are arranged on the locking shell 301, and the connecting rod 107 is installed in the mounting grooves 302 through. A locking rod 303 is installed with a movable limit in the installation groove 302, and a return spring 305 is connected to the locking rod 303. One end of the return spring 305 is in contact with the installation groove 302. The locking rod 303 extends inside the locking shell 301 and one end is welded with a resistance column 304. The inside of the locking shell 301 is connected to an annular rubber tube 309, and the rubber tube 309 is in contact with the resistance column 304. The rubber tube 309 is installed between the outer shell 101 and the pressure cover 102. A locking mechanism is installed at the other end of the locking rod 303, and the locking mechanism is used to clamp the locking connecting rod 107.

[0038] A locking shell 301 is installed between the outer shell 101 and the pressure cover 102. The bottom of the locking shell 301 presses the air inlet end of the airbag 201. At the same time, the locking shell 301 cooperates with the pressure cover 102 to press the rubber tube 309, thereby making the interior of the device as a whole sealed, so that the airbag 201 is filled with high-pressure gas, and at the same time, the rubber tube 309 is also filled with high-pressure gas. The pressure of the high-pressure gas is greater than the atmospheric pressure, so that the rubber tube 309 is in contact with the resistance column 304.

[0039] The locking rod 303 is limitedly installed in the installation groove 302 and can move laterally to lock the connecting rod 107 or unlock the connecting rod 107. The locking or unlocking process is as follows:

[0040] When high-pressure gas is filled into the airbag 201 and the rubber tube 309, the plurality of abutment columns 304 and the plurality of locking rods 303 move laterally toward the connecting rod 107, thereby driving the locking mechanism to move laterally toward the connecting rod 107 in the installation groove 302, so that the locking mechanism locks the connecting rod 107. At this time, when a worker mistakenly operates the connecting rod 107 with the knob connection function, the connecting rod 107 cannot be rotated due to the threaded connection relationship between the connecting rod 107 and the locking housing 301 and the locking mechanism locking the connecting rod 107, thereby avoiding mistaken disassembly operations caused by high-pressure gas inside the device, making the device safer during maintenance and improving safety performance.

[0041] When the airbag 201 is not filled with high-pressure gas, the air pressure inside and outside the rubber tube 309 is the same, and the rubber tube 309 does not resist the multiple resistance columns 304 with high pressure. The reset spring 305 on the locking rod 303 provides elastic force to reset the locking mechanism at one end of the locking rod 303 in the installation groove 302, so as to prevent the locking mechanism from affecting the installation of multiple connecting rods 107. At the same time, after the airbag 201 is depressurized, the locking mechanism is released from the connecting rod 107, which is convenient for the overall disassembly and maintenance of the device, with good use effect and high safety performance.

[0042] Preferably, Figure 5 and Figure 6 As shown, the locking mechanism includes a locking plate 306, a plurality of limiting holes are arranged in the locking plate 306, and the limiting holes are provided with abutting springs 308 and elastic rods 307. The elastic rods 307 are close to the connecting rods 107 relative to the conflicting springs 308 to lock the connecting rods 107.

[0043] The elastic rod 307 can partially pop out of the limiting hole based on the elastic force provided by the abutting spring 308 to limit the connecting rod 107. In addition, when the multiple elastic rods 307 abut the connecting rod 107, a locking groove adapted to the shape of the connecting rod 107 will be formed on the side of the multiple elastic rods 307 away from the abutting spring 308, so as to increase the abutting area of ​​the abutting connecting rod 107 and improve the locking efficiency of the connecting rod 107. In other words, the multiple elastic rods 307 can be adaptively locked when facing connecting rods 107 of different shapes, and have a wide range of applications.

[0044] Preferably, Figure 6 As shown, the elastic rod 307 is a cylindrical rod, and multiple elastic rods 307 are arranged on the same vertical plane. The adaptable clamping of the connecting rod 107 is performed by multiple cylindrical elastic rods 307, and multiple elastic rods 307 on the same vertical plane are in contact with the connecting rod 107, the contact surface is large, and the adaptable locking effect is good.

[0045] Preferably, Figure 2 , Figure 5 and Figure 6 As shown, the connecting rod 107 has a locking portion 1071 with an equilateral hexagonal deformation cross section and a screw portion 1072 with a threaded arrangement. The locking portion 1071 is installed through the gland 102 and is also installed through the installation groove 302. The screw portion 1072 is threadedly connected in the housing 101, and a plurality of elastic rods 307 are clamped and locked in the locking portion 1071.

[0046] The locking portion 1071 on the connecting rod 107 has an equilateral hexagonal cross-section. When the locking portion 1071 with a hexagonal cross-section contacts multiple elastic rods 307, multiple side surfaces can also adapt to the elastic rods 307 for stable engagement. At the same time, the screw portion 1072 threadedly arranged on the connecting rod 107 is threadedly connected to the outer shell 101 for stable connection.

[0047] Preferably, Figure 2 and Figure 4 As shown, the upper end of the pressure cover 102 is connected with an angle stop valve 103, and the angle stop valve 103 is used to introduce high-pressure gas. The angle stop valve 103 on the pressure cover 102 is used to connect a high-pressure gas pipe, so that the high-pressure gas pipe can fill the inside of the device with high-pressure gas. After the high-pressure gas is filled, the angle stop valve 103 is closed to maintain the high-pressure gas environment inside the device.

[0048] Preferably, Figure 2 and Figure 4 As shown, the angle stop valve 103 is connected to a pressure gauge 104 and a pressure relief valve 105. The pressure gauge 104 is used to display the internal pressure of the device, and the pressure relief valve 105 is used to relieve the internal pressure of the device.

[0049] The pressure inside the device is intuitively displayed through the pressure gauge 104 connected to the angle stop valve 103, and the overall pressure value inside the device is observed. When the pressure inside the device decreases, the pressure is supplemented to ensure the normal use of the device. The pressure relief valve 105 releases gas pressure when the pressure inside the device is too high, or when the device needs maintenance, the high-pressure gas inside the airbag 201 is discharged through the pressure relief valve 105 to avoid the presence of high-pressure gas inside the device during maintenance and causing maintenance accidents.

[0050] Preferably, Figure 1 and Figure 4 As shown, a protective cover 106 is connected to the top surface of the gland 102, and the protective cover 106 surrounds and covers the angle stop valve 103, the pressure gauge 104 and the pressure relief valve 105. An opening is arranged on one side of the protective cover 106, and the opening is directly opposite to the gas outlet of the pressure relief valve 105. The protective cover 106 connected to the gland 102 protects the internal angle stop valve 103, the pressure gauge 104 and the pressure relief valve 105, so as to avoid damage to one or more of the angle stop valve 103, the pressure gauge 104 and the pressure relief valve 105 in a complex environment, thereby ensuring the normal protection and use of the device.

[0051] This embodiment also provides a method for using a drilling pump air bag assembly (not shown), which is applied to any of the above-mentioned drilling pump air bag assembly devices.

[0052] Specifically, the shell assembly 1 is installed on the conveying pipeline, the connecting end at the bottom of the outer shell 101 is connected to the conveying pipeline, and the outer shell 101 is connected to the pressure cover 102 through the connecting rod 107 to form a sealed cavity; the cavity inside the outer shell 101 is used to install the air bag assembly 2, and the airbag 201 is installed in the cavity. The airbag 201 is filled with high-pressure gas to allow the airbag 201 to adapt to compression and rebound under the pressure in the conveying pipeline. A buffer mechanism is installed in the airbag 201, wherein the buffer mechanism is used to buffer the impact force of the deformation of the airbag 201 during the process of the airbag 201 adapting to compression and rebound.

[0053] When the device is in use, the bottom of the shell 101 is connected to the conveying pipeline, and a cavity is provided inside the shell 101. The cavity is used to place the spherical airbag 201. The shell 101 and the pressure cover 102 are connected by multiple connecting rods 107, and the airbag 201 is filled with high-pressure gas. A buffer mechanism is connected between the pressure cover 102 and the airbag 201. When the conveying pipeline conveys high-pressure fluid, when the pressure inside the conveying pipeline is too large, the conveying fluid is squeezed on the outer wall of the airbag 201 to compress the airbag 201. When the pressure inside the conveying pipeline decreases, the high-pressure gas inside the airbag 201 causes it to rebound, thereby balancing the pressure inside the conveying pipeline and ensuring the balance of pressure inside the conveying pipeline. The buffer mechanism is used to provide buffer support in the middle of the deformed part of the airbag 201 to avoid severe impact on the deformed middle part of the airbag 201, reduce the huge impact force on the deformed middle part of the airbag 201, extend the service life of the airbag 201, and reduce the risk of rupture caused by the large impact force on the middle part of the airbag 201.

[0054] Although the embodiments of the present invention are described in detail above, it is obvious to those skilled in the art that various modifications and variations can be made to these embodiments. However, it should be understood that such modifications and variations are within the scope and spirit of the present invention as described in the claims. Moreover, the present invention described herein may have other embodiments and may be implemented or realized in a variety of ways.

Claims

1. The drilling pump air bag assembly is characterized by: include: A housing assembly (1), the housing assembly (1) comprising a housing (101) and a gland (102), the housing (101) being provided with a cavity inside, the gland (102) being matched with an opening portion mounted at the top end of the housing (101), the gland (102) being connected through a plurality of connecting rods (107), and the housing (101) and the gland (102) being connected via the plurality of connecting rods (107); An air bag assembly (2), the air bag assembly (2) comprising an air bag (201), the air bag (201) being arranged in an internal cavity of an outer shell (101), the open end of the air bag (201) being arranged between the outer shell (101) and a pressure cover (102), a buffer mechanism being installed between the air bag (201) and the pressure cover (102), the buffer mechanism being used to buffer the impact force of deformation of the air bag (201).

2. The drilling pump air bag assembly according to claim 1, characterized in that: The buffer mechanism comprises a mounting plate (202) and a buffer spring (203); the mounting plate (202) is fixed to the bottom end of the pressure cover (102); the bottom end of the mounting plate (202) is connected to the buffer spring (203); the other end of the buffer spring (203) is connected to the middle part of the airbag (201); and the buffer spring (203) is used to buffer the impact force of deformation of the middle part of the airbag (201).

3. The drilling pump air bag assembly according to claim 2 is characterized in that: The buffer spring (203) is a conical spring, the small end of the buffer spring (203) is connected to the air bag (201), and the large end of the buffer spring (203) is connected to the mounting plate (202).

4. The drilling pump air bag assembly according to claim 3 is characterized in that: The invention also comprises a locking assembly (3), wherein the locking assembly (3) is installed between the housing (101) and the pressure cover (102), and the locking assembly (3) is used to lock the connecting rod (107). The locking assembly (3) comprises a locking shell (301), and the locking shell (301) is a hollow annular cylinder. A plurality of mounting grooves (302) are arranged on the locking shell (301), and the connecting rod (107) is installed in the mounting groove (302). A locking rod (303) is installed in the mounting groove (302) in a movable limit position, and a return spring is connected to the locking rod (303). (305), one end of the reset spring (305) is in contact with the mounting groove (302), the locking rod (303) extends inside the locking shell (301) and one end is welded with a resistance column (304), the inside of the locking shell (301) is connected with an annular rubber tube (309), the rubber tube (309) is in contact with the resistance column (304), the rubber tube (309) is installed between the housing (101) and the pressure cover (102), and the other end of the locking rod (303) is installed with a locking mechanism, and the locking mechanism is used to clamp the locking connecting rod (107).

5. The drilling pump air bag assembly according to claim 4, characterized in that: The locking mechanism comprises a locking plate (306), a plurality of limiting holes are arranged in the locking plate (306), a resisting spring (308) and an elastic rod (307) abutting against each other are installed in the limiting holes, wherein the elastic rod (307) is close to the connecting rod (107) relative to the resisting spring (308), and the plurality of elastic rods (307) are used to clamp and lock the connecting rod (107).

6. The drilling pump air bag assembly according to claim 5, characterized in that: The elastic rod (307) is a cylindrical rod, and a plurality of the elastic rods (307) are arranged on the same vertical plane.

7. The drilling pump air bag assembly according to claim 5 or 6, characterized in that: The connecting rod (107) comprises a locking portion (1071) with an equilateral hexagonal deformation cross section and a screw portion (1072) with a threaded arrangement. The locking portion (1071) is installed through the gland (102) and is also installed through the installation groove (302). The screw portion (1072) is threadedly connected to the housing (101). A plurality of elastic rods (307) are snap-connected to lock the locking portion (1071).

8. The drilling pump air bag assembly according to claim 1, characterized in that: The upper end of the gland (102) is connected to an angle stop valve (103), and the angle stop valve (103) is used to introduce high-pressure gas.

9. The drilling pump air bag assembly according to claim 8, characterized in that: The angle stop valve (103) is connected to a pressure gauge (104) and a pressure relief valve (105); the pressure gauge (104) is used to display the internal pressure of the device, and the pressure relief valve (105) is used to relieve the internal pressure of the device.

10. The drilling pump air bag assembly according to claim 9, characterized in that: The top end surface of the gland (102) is connected to a protective cover (106), and the protective cover (106) surrounds and covers the angle stop valve (103), the pressure gauge (104) and the pressure relief valve (105). An opening is arranged on one side of the protective cover (106), and the opening is arranged opposite to the air outlet end of the pressure relief valve (105).

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