CN115653901A - Flow regulating system of gas extraction pump - Google Patents

Abstract

A flow regulating system of a gas extraction pump belongs to the technical field of gas extraction equipment. The method is characterized in that: the output port of water ring vacuum pump (1) communicates with the input port of vapour and liquid separator (2), the gas delivery outlet of vapour and liquid separator (2) communicates with the input port of three-way valve (3), the input port of gas holder (5) communicates with an output port of three-way valve (3), the input port of buffer tank (4) communicates with another output port of three-way valve (3), the output port of buffer tank (4) is connected with the input port of water ring vacuum pump (1) behind flow control valve (6) in series. The invention realizes the adjustment of the output quantity of the water ring vacuum pump, the high-pressure gas in the buffer tank can enter the input port of the water ring vacuum pump to adjust the flow of the water ring vacuum pump, adjust the delivery quantity of the water ring vacuum pump and store partial gas.

Description

Flow regulating system of gas extraction pump

Technical Field

A flow regulating system of a gas extraction pump belongs to the technical field of gas extraction equipment.

Background

The gas drainage pump is a special device used for pumping out or discharging gas in coal seams, rock stratums and goafs. The water ring vacuum pump is generally adopted for mining gas extraction, and water is arranged in the water ring vacuum pump to serve as working liquid, so that isothermal compression of gas is realized, the water ring vacuum pump is very suitable for pumping inflammable and explosive gas, and is a preferred device for gas pumping.

When the existing water ring vacuum pump is used for extracting gas, the following technical problems exist: after the water ring vacuum pump is installed, the gas extraction amount is determined, the gas extraction amount of the water ring vacuum pump is difficult to adjust, the rotating speed of the water ring vacuum pump is adjusted in a currently commonly-used mode, but a speed change mechanism and a speed change motor are required to be added in the adjusting mode, the initial investment cost is high, due to the fact that the speed change mechanism and the speed change motor are added, the system failure rate is high, frequent maintenance is required, the speed change mechanism usually adopts gear transmission, the heating value is high, the speed change mechanism needs to be maintained at a lower temperature, and when the temperature is low, the viscosity of lubricating oil is high, the working resistance of the speed change mechanism is large, and the power consumption is large.

Disclosure of Invention

The technical problem to be solved by the invention is as follows: the defects of the prior art are overcome, the temporary storage of the output gas can be realized, and the flow regulating system can regulate the flow of the water ring vacuum pump.

The technical scheme adopted by the invention for solving the technical problems is as follows: the flow regulating system of the gas extraction pump is characterized in that: including water ring vacuum pump, vapour and liquid separator, the buffer tank, three-way valve and gas holder, the delivery outlet of water ring vacuum pump and vapour and liquid separator's input port intercommunication, vapour and liquid separator's gas delivery outlet and three-way valve's input port intercommunication, the input port of buffer tank and another delivery outlet intercommunication of three-way valve, the input port of buffer tank and a delivery outlet intercommunication of three-way valve, the delivery outlet of gas holder is established ties behind the flow control valve with water ring vacuum pump's input port intercommunication.

Preferably, the gas holder include aqua storage tank, a movable section of thick bamboo, guider and water seal arrangement, the uncovered setting in top of aqua storage tank, the equal uncovered setting in both ends of a movable section of thick bamboo, slidable connects between every two adjacent movable sections of thick bamboo, the movable section of thick bamboo and the aqua storage tank slidable of bottom are connected, all be provided with water seal arrangement between every two adjacent movable sections of thick bamboo and between the movable section of thick bamboo and the aqua storage tank of bottom, each movable section of thick bamboo all is connected with guider slidable, guider encircles movable section of thick bamboo interval and is provided with at least threely. The gas in the gas holder is guaranteed to maintain stable pressure by the aid of the movable cylinder which can stretch out and draw back according to air pressure in the gas holder, the water storage tank can seal the bottom of the gas holder, the water seal device can seal between the movable cylinder and the water storage tank and between adjacent movable cylinders, gas leakage is avoided, the guide device can lift the movable cylinder, lifting stability of the movable cylinder is guaranteed, and sealing reliability between adjacent movable cylinders is guaranteed.

Preferably, the guiding device comprises a supporting column and a guide rail, the supporting column is vertically arranged, the guide rail is vertically arranged on the supporting column, the outer side of each movable cylinder is provided with an elastic supporting part, and the elastic supporting parts can be slidably supported on the guide rail. The elastic support part is supported on the guide rail, so that the lifting of the movable cylinder can be guided, and the movable cylinder can be prevented from being damaged due to rigid load between the movable cylinder and the guide rail.

Preferably, the elastic support part comprises a supporting wheel, an installation rod and a supporting arm main body, the supporting arm main body is installed on the outer side of the corresponding movable barrel, one end of the installation rod is connected with the supporting arm main body in a sliding manner, the other end of the installation rod is rotatably provided with the supporting wheel, a supporting spring is arranged between the supporting arm main body and the installation rod, and the supporting spring pushes the installation rod to move towards the direction close to the supporting column. Supporting spring promotes the installation pole to the direction motion that is close to the support column, makes the supporting wheel along the guide rail motion, can enough realize leading the lift of a movable section of thick bamboo, because supporting spring's existence can allow a movable section of thick bamboo to take place radial rocking again, avoids causing the damage to a movable section of thick bamboo.

Preferably, one side of the guide rail, which is close to the movable cylinder, is an arc-shaped guide part with a convex middle part, the elastic support part is provided with an arc-shaped support part with a concave middle part, and the support part is slidably supported on the guide part. The guide part and the supporting part are both arc-shaped, so that relative rotation occurs between the guide part and the supporting part, further assembly errors are eliminated, and the movable barrel can have certain movement allowance.

Preferably, the water sealing device comprises a sealing water tank arranged at the top of the movable cylinder and a sealing part arranged at the bottom of the movable cylinder, the sealing water tank is arranged around the outer wall of the movable cylinder, the sealing part is arranged around the inner wall of the movable cylinder, and each sealing part can slidably extend into the sealing water tank adjacent to the lower side. The sealing part extends into the sealing water tank, and water in the sealing water tank can seal between adjacent movable cylinders, so that the problem of gas leakage is avoided.

Preferably, flow control valve include the flow valve body, the governing valve seal, flow control subassembly and pressure release protection subassembly, be provided with governing valve air inlet and governing valve gas outlet on the flow valve body, the governing valve gas outlet is provided with the governing valve sealing that reduces gradually along the air current direction diameter, the governing valve seal sets gradually along the air current direction with the governing valve sealing, the diameter of adjusting the seal reduces gradually from top to bottom, flow control subassembly is connected with adjusting seal slidable, the pressure release protection subassembly sets up in the flow control subassembly, the pressure release protection subassembly is connected with the regulation seal, one side and the buffer tank intercommunication of pressure release protection subassembly. The flow that can adjust governing valve gas outlet output through the flow control subassembly to the flow that enters into water ring vacuum pump is adjusted to, and then adjusts the volume of taking out of water ring vacuum pump, when the pressure release protection subassembly can the buffer tank pressure release, promotes the governing valve seal and seals the governing valve gas outlet, avoids the air to enter into in the water ring vacuum pump.

Preferably, the flow regulating assembly comprises a regulating valve screw and a regulating valve core, the regulating valve core is slidably mounted in the regulating valve body, the regulating valve screw is rotatably mounted on the regulating valve body, the regulating valve screw is in threaded connection with the regulating valve core, the regulating valve sealing body is arranged between the regulating valve core and the regulating valve sealing part, and the upper part of the regulating valve sealing body is connected with the pressure relief protection assembly through a push rod. The adjusting valve screw rod is in threaded connection with the adjusting valve core, the distance between the adjusting valve sealing body and the adjusting valve gas outlet is pushed, the flow of the adjusting valve gas outlet is adjusted, and adjustment is convenient.

Preferably, the pressure relief protection assembly comprises an elastic membrane and a cavity arranged in the regulating valve core, the elastic membrane is arranged in the cavity and divides the cavity into a detection cavity close to the regulating valve sealing body and a balance cavity far away from the regulating valve sealing body, the detection cavity is communicated with the buffer tank, the balance cavity is filled with compressed inert gas, and the regulating valve sealing body is connected with the elastic membrane. When the buffer tank releases pressure, the pressure in the detection cavity is reduced, the elastic membrane moves downwards at the moment, the adjusting valve sealing body is pushed to move downwards, the air outlet of the adjusting valve is sealed, and air is prevented from entering the water ring vacuum pump.

Compared with the prior art, the invention has the beneficial effects that:

the gas storage of this gas drainage pump's flow control system's water ring vacuum pump output is in the gas holder, and partial gas enters into the buffer tank through the three-way valve, realized the regulation to water ring vacuum pump's output quantity, high-pressure gas in the buffer tank can enter into water ring vacuum pump's input port, adjust with the flow to water ring vacuum pump, and then adjust water ring vacuum pump's transmission capacity, compare with adoption speed change mechanism and variable speed motor, the input cost is low, and the maintenance cost among the operation process is low, and can also be when water ring vacuum pump's air input is not enough, utilize the gas of storing in the buffer tank to realize the replenishment of air input, with the stable work of assurance water ring vacuum pump.

Drawings

Fig. 1 is a schematic structural diagram of a flow rate adjusting system of a gas extraction pump.

FIG. 2 is a front cross-sectional view of a gas holder.

Fig. 3 is a partially enlarged view of a portion a in fig. 2.

Fig. 4 is a schematic sectional front view of the movable support arm and the support column.

Fig. 5 is a front cross-sectional schematic view of a three-way valve.

FIG. 6 is a schematic front view of the connection of the push plate and the valve stem.

Fig. 7 is a front cross-sectional view of the flow control valve.

Fig. 8 is a partial enlarged view of fig. 7 at B.

Fig. 9 is a front view of a pump cap.

FIG. 10 is a front view of a dispensing tray.

FIG. 11 is a schematic sectional view of the connection of the valve plate to the distribution plate.

In the figure: 1. <xnotran> 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 2701, 2702, 2703, 2704, 2705, 28, 29, 30, 31, 3101, 3102, 32, 33, 34, 35, 36, 3601, 37, 38, 39, 3901, 3902, 3903, 3904, 3905, 3906, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, </xnotran> A guide rod 62, a support nut 63, a sealing spring 64 and a valve plate.

Detailed Description

The present invention is further described with reference to the following detailed description, however, it should be understood by those skilled in the art that the detailed description given herein with respect to the accompanying drawings is for better explanation and that the present invention is not necessarily limited to the specific embodiments, but rather, for equivalent alternatives or common approaches, may be omitted from the detailed description, while still remaining within the scope of the present application.

FIGS. 1 to 11 show preferred embodiments of the present invention, and the present invention will be further described with reference to FIGS. 1 to 11.

Flow control system of gas drainage pump, including water ring vacuum pump 1, vapour and liquid separator 2, buffer tank 4, three-way valve 3 and gas holder 5, the delivery outlet of water ring vacuum pump 1 and the input port of vapour and liquid separator 2 intercommunication, the gas delivery outlet of vapour and liquid separator 2 and the input port of three-way valve 3 intercommunication, the input port of gas holder 5 and the delivery outlet of three-way valve 3 intercommunication, the input port of buffer tank 4 and another delivery outlet of three-way valve 3 intercommunication, behind the delivery outlet series flow control valve 6 of buffer tank 4 with the input port intercommunication of water ring vacuum pump 1. The gas of this flow control system of gas drainage pump's water ring vacuum pump 1 output is saved in gas holder 5, and partial gas enters into buffer tank 4 through three-way valve 3, the regulation to the output of water ring vacuum pump 1 has been realized, the high-pressure gas in buffer tank 4 can enter into the input port of water ring vacuum pump 1, adjust with the flow to water ring vacuum pump 1, and then adjust the transmission capacity of water ring vacuum pump 1, compare with adopting speed change mechanism and variable speed motor, the input cost is low, and the maintenance cost among the operation process is low, and can also be when the air input of water ring vacuum pump is not enough, utilize the gas of storing in the buffer tank 4 to realize the replenishment of air input, with the stable work of assurance water ring vacuum pump 1.

Specifically, the method comprises the following steps: as shown in fig. 1: the output port of the water ring vacuum pump 1 is communicated with the input port of the gas-liquid separator 2, the gas output port of the gas-liquid separator 2 is communicated with the input port of the three-way valve 3, one output port of the three-way valve 3 is communicated with the input port of the buffer tank 4, the other output port is communicated with the input port of the gas storage cabinet 5, the output port of the buffer tank 4 is communicated with the input port of the water ring vacuum pump 1 through a gas supplementing pipe 7, and the gas supplementing pipe 7 is provided with a flow regulating valve 6. The output port of the gas storage cabinet 5 is connected with a stop valve to control the on-off of the gas output.

As shown in fig. 2~3: the gas storage cabinet 5 comprises a water storage tank 10, a movable cylinder 12, a guide device and a water seal device, wherein the water storage tank 10 is a cylinder with an open top, and the bottom of the water storage tank 10 is sealed by a bottom plate 8 and is installed by the bottom plate 8. The top coaxial arrangement of aqua storage tank 10 has a fixed section of thick bamboo 11, and the lower extreme of fixed section of thick bamboo 11 stretches into in the aqua storage tank 10 to with the aqua storage tank 10 welding, sealed the setting between the bottom of fixed section of thick bamboo 11 and the aqua storage tank 10. The movable cylinder 12 is provided with a plurality of from bottom to top, and the diameter of each movable cylinder 12 is reduced gradually from bottom to top, and the bottom of the movable cylinder 12 of upside stretches into the adjacent movable cylinder 12 of downside, and the lower extreme of the movable cylinder 12 of downside stretches into in the fixed cylinder 11, all is provided with water seal between every two adjacent movable cylinders 12 and between the top of the movable cylinder 12 of downside and fixed cylinder 11, and in this embodiment, the movable cylinder 12 is provided with threely from bottom to top. The top of the topmost movable cylinder 12 is closed by a tank top 13, and the middle of the tank top 13 is connected with an exhaust valve 14. The bottom of guider is installed on bottom plate 8, and guider's lateral part is connected with a movable section of thick bamboo 12 slidable, and guider encircles 12 intervals of a movable section of thick bamboo and is provided with at least three, and in this embodiment, guider encircles 12 intervals equipartitions of a movable section of thick bamboo and has threely, can lead to a movable section of thick bamboo 12, guarantees that a movable section of thick bamboo 12 goes up and down more stably, and then guarantees between the adjacent movable section of thick bamboo 12 and the movable section of thick bamboo 12 of bottom and fixed cylinder 11 between sealed reliable.

The gas storage cabinet 5 further comprises an input pipe 9 and an output pipe 21, the input pipe 9 and the output pipe 21 are both arranged on the lower side of the bottom plate 8, and the output end of the input pipe 9 and the input end of the output pipe 21 both penetrate through the water storage tank 10 and then extend into the fixing barrel 11 so as to send gas into the gas storage cabinet 5 or send the gas in the gas storage cabinet 5 out.

The water sealing device comprises a sealing water tank 22 and a sealing part 23, an inward flanging is arranged around the top of each movable cylinder 12, the inner side of each inward flanging is bent downwards to form the sealing part 23 arranged around the top of each movable cylinder 12, an outward flanging is arranged around the bottom of each movable cylinder 12, the outer side of the outward flanging is bent upwards to form the sealing water tank 22 arranged around each movable cylinder 12, between every two adjacent movable cylinders 12, the bottom of the movable cylinder 12 on the upper side can slidably extend into the top of the movable cylinder 12 on the lower side, the inner wall of the sealing part 23 is connected with the adjacent movable cylinder 12 on the upper side in a fitting and sliding manner, the inner wall of the sealing part 23 is arranged between the outer walls of the adjacent movable cylinders 12 in a sealing manner, the bottom of the sealing part 23 extends into the adjacent sealing water tank 22 and is positioned below the water level of the sealing water tank 22, the water in the sealing water tank 22 can realize the sealing between the adjacent movable cylinders 12, and the leakage between the adjacent movable cylinders 12 is avoided.

The water seal device between the lowermost movable cylinder 12 and the fixed cylinder 11 has the same structure as the water seal device between the adjacent movable cylinders 12.

The guider includes support column 15, guide rail 19 and elastic support device, in this embodiment, elastic support device includes fixed support arm 16, movable support arm 17, supporting wheel 18 and supporting spring 26, support column 15 is vertical to be installed at the upside of bottom plate 8, 19 vertical installations are in one side that support column 15 is close to aqua storage tank 10 in the guide rail, the level of fixed support arm 16 sets up, the one end of fixed support arm 16 and the top fixed connection of fixed section of thick bamboo 11, the rotatable supporting wheel 18 of installing of the other end, be provided with supporting spring 26 between supporting wheel 18 and the fixed support arm 16. Each movable cylinder 12 is provided with a movable supporting arm 17, the movable supporting arms 17 are inclined upwards gradually along the direction close to the supporting column 15, one end of each movable supporting arm 17 is fixedly connected with the top of the corresponding movable cylinder 12, the other end of each movable supporting arm is rotatably provided with a supporting wheel 18, and a supporting spring 26 is arranged between each supporting wheel 18 and the corresponding movable supporting arm 17. Each supporting wheel 18 is supported on the guide rail 19 in a sliding way under the action of a supporting spring 26, and a limiting plate 20 is arranged at the top of the supporting column 15, so that the supporting wheels 18 can be prevented from rolling off the guide rail 19 from the top of the supporting column 15.

As shown in fig. 4: the structure of the fixed support arm 16 is the same as that of the movable support arm 17, and in the present embodiment, the structures of the fixed support arm 16 and the movable support arm 17 are explained by taking the structure of the movable support arm 17 as an example.

The movable support arm 17 comprises an installation rod 24 and a support arm main body 25, one end of the support arm main body 25 is fixedly connected with the movable cylinder 12, the other end of the support arm main body is provided with an installation blind hole, one end of the installation rod 24 can slide into the installation blind hole, the other end of the installation rod 24 can be rotatably provided with a support wheel 18, a support spring 26 is arranged in the installation blind hole, the support spring 26 is in a compression state, one end of the support spring 26 is supported at the bottom of the installation blind hole, the other end of the support spring is supported at the bottom of the installation rod 24, and the support wheel 18 is pushed to compress the guide rail 19.

The outer side of each guide rail 19 is provided with a semi-cylindrical guide part with a convex middle part, each supporting wheel 18 is a grooved wheel, a supporting part with a semi-circular groove shape with a concave middle part is arranged around the lateral part of the supporting wheel 18, and the supporting part is supported on the guide part, so that the movable cylinder 12 is guided, the lifting stability of the movable cylinder 12 can be ensured, and the damage of the movable cylinder 12 caused by rigid load can be avoided.

As shown in fig. 5~6: the three-way valve includes a three-way valve body 27, a diverter spool 36, a three-way spool 30, and an adjustment assembly.

The bottom of the three-way valve body 27 is provided with a three-way valve air inlet 2701, the left side of the three-way valve body 27 is provided with a three-way valve flow dividing port 2703, the right side of the three-way valve body 27 is provided with a three-way valve air outlet 2072, and the three-way valve air outlet 2702 and the three-way valve flow dividing port 2703 are both communicated with the three-way valve air inlet 2701. An air inlet sealing portion 2704 is arranged at the output end of the three-way valve air inlet 2701, the diameter of the air inlet sealing portion 2704 is gradually reduced from bottom to top, a flow dividing sealing portion 2705 is arranged at the input end of the three-way valve flow dividing port 2703, and the diameter of the flow dividing sealing portion 2705 is gradually reduced along the air flow direction.

The three-way valve comprises a three-way valve core 30, a three-way valve spring 29 and a three-way valve support ring 28, wherein the three-way valve core 30 is arranged between a sealing portion 2704 of the air inlet and the support ring 28, the diameter of the three-way valve core 30 is smaller than that of the air inlet 2701 of the three-way valve, the three-way valve core 30 and the air inlet 2701 of the three-way valve are coaxially arranged, the three-way valve core 30 is arranged between the three-way valve core 30 and the support ring 28, the three-way valve spring 29 is in a compressed state, the bottom of the three-way valve spring 29 is supported on the support ring 28, the top end of the three-way valve core 30 is supported at the bottom of the three-way valve core 30, the top of the three-way valve core 30 is pushed to press the sealing portion 2704 of the air inlet 2701 of the three-way valve, and the air inlet 2701 of the three-way valve is closed. And because the three-way valve core 30 is located at the lower side of the air inlet sealing portion 2704, the air pressure of the three-way valve core 30 can assist in pushing the three-way valve core 30 to press the air inlet sealing portion 2704, so as to ensure that the three-way valve core 2701 is reliably closed.

The flow dividing valve core 36 and the flow dividing sealing part 2705 are sequentially arranged along the air flow direction, one end, close to the flow dividing sealing part 2705, of the flow dividing valve core 36 is provided with a valve core sealing part 3601, the diameter of the valve core sealing part 3601 is gradually increased along the direction far away from the flow dividing sealing part 2705, and the flow of gas discharged through the flow dividing port 2703 of the three-way valve can be adjusted by adjusting the distance between the flow dividing valve core 36 and the flow dividing sealing part 2705.

The adjustment assembly is simultaneously connected to the three-way valve spool 30 and the diverter valve spool 36 and urges the three-way valve spool 30 and the diverter valve spool 36 to move.

The adjusting component comprises a three-way valve screw 37, a guide post 33 and a valve rod 32, the top of the three-way valve body 27 is in threaded connection with a three-way valve cover 34, and a sealing ring is arranged between the three-way valve cover 34 and the three-way valve body 27 to ensure the reliable sealing between the three-way valve cover 34 and the three-way valve body 27. The lower end of the three-way valve screw 37 passes through the three-way valve cover 34 and extends into the three-way valve body 27, the three-way valve screw 37 is in threaded connection with the three-way valve cover 34, and air is allowed to enter and exit between the three-way valve screw 37 and the three-way valve cover 34. Guide post 33 slidable sets up in three-way valve body 27, still is provided with three-way valve guide table 35 in three-way valve body 27, is provided with the three-way valve guide way with three-way valve guide table 35 matched with on the guide post 33, and the guide way cooperates with three-way valve guide table 35, can avoid guide post 33 to take place to rotate, and sealed setting between guide post 33 and the three-way valve body 27. The upper end of the valve rod 32 is fixedly connected with the guide column 33, the bottom of the valve rod 32 is fixedly connected with the three-way valve core 30, the three-way valve spring 29 pushes the top of the guide column 33 through the three-way valve core 30 and the valve rod 32 to press the three-way valve screw 37, and the three-way valve screw 37 can push the three-way valve 30 to move downwards and open the three-way valve air inlet 2701.

A cam assembly is disposed between the adjusting assembly and the flow dividing valve core 36, that is, a cam assembly is disposed between the valve rod 32 and the flow dividing valve core 36, so that the flow dividing valve core 36 can move horizontally along with the lifting and lowering of the valve rod 32 to adjust the flow output from the flow dividing port 2703 of the three-way valve.

The cam component comprises a push plate 31 and a pin shaft 38, a guide long hole is formed in the push plate 31, the pin shaft 38 is installed on the valve rod 32, the pin shaft 38 can slidably extend into the guide long hole, the push plate 31 is fixedly connected with the shunt valve core 36 and drives the shunt valve core to move synchronously, and then the lifting motion of the valve rod 32 is converted into the horizontal motion of the shunt valve core 36. The push plate 31 has two that set up in valve rod 32 both sides, and the direction slot hole on each push plate 31 is just right to setting up, and the both sides of valve rod 32 all are provided with round pin axle 38, and each round pin axle 38 all slidable stretches into in the direction slot hole that corresponds the side.

The guide long hole includes a vertical portion 3102 and an adjustment portion 3101, the adjustment portion 3101 is provided on the lower side of the vertical portion 3102, the adjustment portion 3101 is inclined upward in a direction away from the diverter core 36, and the upper end of the adjustment portion 3101 is connected to the lower end of the vertical portion 3102. When the valve rod 32 moves downwards, the three-way valve core 30 is pushed to move downwards firstly, the three-way valve inlet 2701 is opened, the valve rod 32 continues to move downwards, the three-way valve core 30 is separated from the air inlet sealing portion 2704 at the moment, the lifting of the three-way valve core 30 cannot influence the air inflow of the three-way valve inlet 2701, and the flow dividing valve core 36 moves rightwards along with the descending of the valve rod 32 at the moment, so that the air outflow of the three-way valve branch port 2703 is adjusted through the flow dividing valve core 36, the three-way valve core 30 and the flow dividing valve core 36 can be controlled separately, and the control is convenient.

Due to the structure of the valve element sealing portion 3601 and the shunt sealing portion 2705, even if the lower side of the shunt valve element 36 falls on the inner wall of the shunt valve body 27, the shunt valve element 36 can be guided when the shunt valve element 36 moves axially, so that the distance between the valve element sealing portion 3601 and the shunt sealing portion 2705 can be adjusted. A plurality of support rods can be arranged on the side of the shunt valve core 36, the inner ends of the support rods are fixedly connected with the shunt valve core 36, and the outer ends of the support rods are supported on the inner wall of the shunt valve body 27 in a sliding manner, so that the shunt valve core 36 and the shunt sealing part 2705 are kept coaxial.

As shown in fig. 7~8: the flow regulating valve 6 includes a flow regulating valve body 39, a regulating valve sealing body 40, a flow regulating assembly, and a pressure relief protection assembly.

The bottom of flow control valve body 39 is provided with governing valve gas outlet 3902, and flow control valve 39's right side is provided with governing valve air inlet 3901, and the input of governing valve gas outlet 3902 is provided with governing valve sealing 3903, and governing valve sealing 3903's diameter is along the air current direction taper.

The governing valve seal 40 sets up the upside at governing valve sealing 3903, and the diameter of the lower part of governing valve seal 40 from top to bottom reduces gradually, through the interval of adjusting governing valve seal 40 and governing valve sealing 3903, can adjust the air output by governing valve gas outlet 3902, when governing valve seal 40 compresses tightly governing valve sealing 3903, can seal governing valve gas outlet 3902.

The flow regulating assembly is installed on the regulating valve body 39, the regulating valve sealing body 40 is connected with the flow regulating assembly in a slidable manner, the pressure relief protection assembly is arranged in the flow regulating assembly, and the regulating valve sealing body 40 is connected with the pressure relief protection assembly, so that the regulating valve sealing body 40 is lifted along with the flow regulating assembly.

The flow regulating assembly comprises a regulating valve core 41 and a regulating valve screw 48, wherein the regulating valve core 41 is slidably arranged in a regulating valve body 39, the regulating valve core 41 and the regulating valve body 39 are hermetically arranged, a regulating valve sealing body 40 is slidably arranged at the bottom of the regulating valve core 41, a regulating valve boss is arranged on the inner wall of the regulating valve body 39, a regulating valve groove matched with the regulating valve boss is arranged on the outer wall of the regulating valve core 41, the regulating valve boss is matched with the regulating valve groove, and relative rotation between the regulating valve core 41 and the regulating valve body 39 is avoided. The top of the adjusting valve body 39 is in threaded connection with an adjusting valve end cover 49, the lower end of an adjusting valve screw 48 penetrates through the adjusting valve end cover 49 and then is in threaded connection with an adjusting valve core threaded hole in the top of the adjusting valve core 41, the adjusting valve screw 48 is rotatably connected with the adjusting valve end cover 49, the adjusting valve core 41 can be driven to lift by rotating the adjusting valve screw 48, the adjusting valve sealing body 40 is driven to move, and therefore the distance between the adjusting valve sealing body 40 and the adjusting valve sealing portion 3903 is adjusted.

The pressure relief protection assembly comprises an elastic diaphragm 47 and a cavity arranged in the regulating valve core 41, wherein the upper part and the lower part of the regulating valve core 41 are detachably connected, the cavity is formed between the upper part and the lower part of the regulating valve core 41, the elastic diaphragm 47 is arranged between the upper part and the lower part of the regulating valve core 41, the upper part and the lower part of the regulating valve core 41 are matched and clamped with the outer edge of the elastic diaphragm 47, the cavity is divided into a balance cavity 43 at the upper side and a detection cavity 44 at the lower side by the elastic diaphragm 47, the detection cavity 44 is communicated with the buffer tank 4, the balance cavity 43 is filled with compressed inert gas, the sealing body regulating valve 40 is connected with the elastic diaphragm 47 through a push rod 42, the push rod 42 is slidably arranged in the regulating valve core 41, the lower end of the push rod 42 is fixedly connected with the regulating valve sealing body 40, and the upper end of the push rod is fixedly connected with the middle part of the elastic diaphragm 40. When the valve body works normally, the pressure in the detection cavity 44 is slightly larger than the pressure in the balance cavity 43, and the middle part of the elastic membrane 47 has a tendency of moving upwards, so that the top of the regulating valve sealing body 40 presses the bottom of the regulating valve core 41, and the synchronous movement between the regulating valve sealing body 40 and the regulating valve core 41 is further ensured; when the buffer tank 4 is depressurized and the pressure is relieved to a specified pressure, the pressure of the detection cavity 44 is smaller than the pressure of the balance cavity 43, the middle of the elastic diaphragm 47 moves downwards, the bottom of the adjusting valve sealing body 40 compresses the adjusting valve sealing part 3903, the adjusting valve air outlet 3902 is sealed, and air is prevented from entering the water ring vacuum pump 1, so that gas and air are mixed.

The inner wall of the regulating valve body 39 is provided with a detection communicating groove 3904 and a yielding groove 3906, the yielding groove 3906 and the detection communicating groove 3904 are both arranged along the movement direction of the regulating valve core 41, and the detection communicating groove 3904 and the yielding groove 3906 are respectively arranged on two sides of the inner wall of the regulating valve body 39.

The regulating valve body 39 is further provided with a detection air inlet channel 3905 communicated with the detection communicating groove 3904, the inner end of the detection air inlet channel 3905 is communicated with the detection communicating groove 3904, and the outer end of the detection air inlet channel 3905 is communicated with the buffer tank 4 through a pipeline. The adjusting valve core 41 is provided with a detection air inlet 45, the inner end of the detection air inlet 45 is communicated with the detection cavity 44, and the outer end of the detection air inlet 45 is communicated with the detection communicating groove 3904, so that the detection cavity 44 can be ensured to be communicated with the detection air inlet channel 3905 in the movement process of the adjusting valve core 41.

The adjusting valve core 41 is further provided with an inflating opening 46, the inflating opening 46 is arranged opposite to the abdicating groove 3906, the inflating opening 46 is used for injecting compressed inert gas into the balance cavity 43, the inflating opening 46 is sealed through a plug, the inflating opening 46 can also be directly provided with an air nozzle, and the abdicating groove 3906 can avoid the mutual interference of the plug or the air nozzle and the inner wall of the adjusting valve body 39.

As shown in fig. 9: the pump cover 50 of the water ring vacuum pump 1 is provided with a pump cover shaft hole 52, the axis of the pump cover shaft hole 52 is positioned on the upper side of the central line of the pump cover 50, the inner side of the pump cover 50 is provided with a plurality of convex partition plates, the inner cavity of the pump cover 50 is divided into an air inlet cavity and an air outlet cavity, an air inlet is communicated with the air inlet cavity, an air outlet is communicated with the air outlet cavity, the top and the bottom of the pump cover 50 are both provided with a communicating hole cavity 54 and a liquid inlet cavity 51, a communicating hole is formed in the communicating hole cavity 54 and is used for being fixedly connected with the pump body, and a liquid inlet hole is formed in the liquid inlet cavity 51 to facilitate adding of working liquid. Both sides of the pump cover 50 are provided with access ports 53.

As shown in fig. 10: the distribution plate 55 is provided with a distribution plate shaft hole, and the axis of the distribution plate shaft hole is arranged on the upper side of the axis of the distribution plate 55. Both sides of the lower part of the distribution disc 55 are provided with side connection lugs 56 connected with the pump body, and each side connection lug 56 is provided with a side connection hole. An upper connecting lug 57 is arranged at the top of the distribution disc 55, a plurality of upper connecting holes are arranged on the upper connecting lug 57 side by side, and the relative angle between the distribution disc and the pump cover can be adjusted through the connection of different upper connecting holes and the pump body so as to adjust the air volume of the water ring vacuum pump 1.

A distribution plate air inlet 58 is arranged on the right side of the distribution plate 55, a distribution plate air outlet 59 is arranged on the upper portion of the left side of the distribution plate 55, and a plurality of distribution plate air exhaust long holes 60 are arranged on the lower side of the distribution plate air outlet 59.

As shown in fig. 11: one side of the distribution disc 55 close to the pump cover 50 on the corresponding side is provided with a valve plate 64 and an elastic pressing device, the elastic pressing device is connected with the distribution disc 55 and presses the valve plate 64 on the distribution disc 55, the valve plate 64 closes the distribution disc exhaust long hole 60, and when a certain pressure is reached, the valve plate 64 opens the distribution disc exhaust long hole 60. The elastic pressing device has two symmetrically arranged valve discs 64.

The elastic pressing device comprises a sealing spring 63, a guide rod 61 and a support nut 62, one end of the guide rod 61 can slide to penetrate through a valve plate 64 and then is in threaded connection with the distribution disc 55, the other end of the guide rod 61 is in threaded connection with the support nut 62, the sealing spring 63 is sleeved outside the guide rod 61 and is in a compressed state, the upper end of the sealing spring 63 is supported on the support nut 62, the lower end of the sealing spring 63 is supported on the valve plate 64, the valve plate 64 is pressed on the distribution disc 55, and therefore the exhaust long hole 60 of the distribution disc is sealed.

As shown in fig. 1: the working process of the flow regulating system of the gas extraction pump is as follows: can carry the gas that water ring vacuum pump 1 extracted to keeping in gas holder 5 through three-way valve 3, can also make partial gas enter into buffer tank 4 and keep in, and then reduce this gas drainage pump's flow control system's gas output volume, can adjust the flow of carrying the gas to buffer tank 4 in through three-way valve 3, and then adjust the flow of the gas of this gas drainage pump's flow control system output.

The flow control valve 6 can control the on-off of the gas in the buffer tank 4 conveyed to the water ring vacuum pump 1, and can also adjust the input quantity of the gas, so as to adjust the extraction quantity of the water ring vacuum pump 1.

The two adjustment modes can be used simultaneously or independently, so that the gas conveying amount of the water ring vacuum pump 1 can be adjusted.

The foregoing is directed to preferred embodiments of the present invention, other and further embodiments of the invention may be devised without departing from the basic scope thereof, and the scope thereof is determined by the claims that follow. However, any simple modification, equivalent change and modification of the above embodiments according to the technical essence of the present invention are within the protection scope of the technical solution of the present invention.

Claims (9)

1. The flow regulating system of the gas extraction pump is characterized in that: the device comprises a water ring vacuum pump (1), a gas-liquid separator (2), a buffer tank (4), a three-way valve (3) and a gas storage tank (5), wherein an output port of the water ring vacuum pump (1) is communicated with an input port of the gas-liquid separator (2), a gas output port of the gas-liquid separator (2) is communicated with an input port of the three-way valve (3), an input port of the gas storage tank (5) is communicated with an output port of the three-way valve (3), an input port of the buffer tank (4) is communicated with another output port of the three-way valve (3), and an output port of the buffer tank (4) is communicated with an input port of the water ring vacuum pump (1) after being connected with a flow regulating valve (6) in series.

2. The flow rate adjusting system of the gas extraction pump according to claim 1, characterized in that: gas holder (5) including aqua storage tank (10), a movable section of thick bamboo (12), guider and water seal arrangement, the open setting in top of aqua storage tank (10), the equal open setting in both ends of a movable section of thick bamboo (12), slidable connects between every two adjacent movable section of thick bamboos (12), movable section of thick bamboo (12) and aqua storage tank (10) slidable of bottom are connected, all be provided with the water seal arrangement between the movable section of thick bamboo (12) of every adjacent and bottom between movable section of thick bamboo (12) and aqua storage tank (10), each movable section of thick bamboo (12) all are connected with guider slidable, guider encircles movable section of thick bamboo (12) interval and is provided with at least three.

3. The flow rate adjusting system of the gas extraction pump according to claim 2, characterized in that: the guiding device comprises supporting columns (15) and guide rails (19), wherein the supporting columns (15) are vertically arranged, the guide rails (19) are vertically arranged on the supporting columns (15), the outer sides of the movable cylinders (12) are respectively provided with an elastic supporting part, and the elastic supporting parts can be slidably supported on the guide rails (19).

4. The flow rate adjusting system of the gas extraction pump according to claim 3, characterized in that: the elastic support part comprises a support wheel (18), an installation rod (24) and a support arm main body (25), the support arm main body (25) is installed on the outer side of the corresponding movable cylinder (12), one end of the installation rod (24) is connected with the support arm main body (25) in a sliding mode, the support wheel (18) is installed at the other end in a rotating mode, a support spring (26) is arranged between the support arm main body (25) and the installation rod (24), and the support spring (26) pushes the installation rod (24) to move towards the direction close to the support column (15).

5. The flow rate adjusting system of the gas extraction pump according to claim 3, characterized in that: one side of the guide rail (19) close to the movable cylinder (12) is an arc-shaped guide part with a convex middle part, an arc-shaped support part with a concave middle part is arranged on the elastic support part, and the support part can be slidably supported on the guide part.

6. The flow rate adjusting system of the gas extraction pump according to claim 2, characterized in that: the water seal device comprises a sealing water tank (22) arranged at the top of the movable cylinder (12) and a sealing part (23) arranged at the bottom of the movable cylinder (12), wherein the sealing water tank (22) is arranged around the outer wall of the movable cylinder (12), the sealing part (23) is arranged around the inner wall of the movable cylinder (12), and each sealing part (23) can slidably extend into the sealing water tank (22) adjacent to the lower side.

7. The flow rate adjusting system of the gas extraction pump according to claim 1, characterized in that: flow control valve (6) including flow valve body (39), governing valve seal (40), flow control subassembly and pressure release protection subassembly, be provided with governing valve air inlet (3901) and governing valve gas outlet (3902) on flow valve body (39), governing valve gas outlet (3902) are provided with along governing valve sealing (3903) of air current direction diameter decrement gradually, governing valve seal (40) set gradually along air current direction with governing valve sealing (3903), the diameter of adjusting seal (40) reduces gradually from top to bottom, flow control subassembly and regulation seal (40) slidable are connected, the pressure release protection subassembly sets up in flow control subassembly, the pressure release protection subassembly is connected with adjusting seal (40), one side and buffer tank (4) the intercommunication of pressure release protection subassembly.

8. The flow rate adjusting system of the gas extraction pump according to claim 7, characterized in that: the flow regulation assembly comprises a regulation valve screw (48) and a regulation valve core (41), the regulation valve core (41) is slidably mounted in a regulation valve body (39), the regulation valve screw (48) is rotatably mounted on the regulation valve body (39), the regulation valve screw (48) is in threaded connection with the regulation valve core (41), a regulation valve sealing body (40) is arranged between the regulation valve core (41) and a regulation valve sealing part (3903), and the upper part of the regulation valve sealing body (40) is connected with the pressure relief protection assembly through a push rod (42).

9. The flow rate adjustment system for a gas extraction pump according to claim 7 or 8, characterized in that: the pressure relief protection assembly comprises an elastic membrane (47) and a cavity arranged in the regulating valve core (41), the elastic membrane (47) is arranged in the cavity, the cavity is divided into a detection cavity (44) close to the regulating valve sealing body (40) and a balance cavity (43) far away from the regulating valve sealing body (40), the detection cavity (44) is communicated with the buffer tank (4), the balance cavity (43) is filled with compressed inert gas, and the regulating valve sealing body (40) is connected with the elastic membrane (47).

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