CN210222575U

CN210222575U - Constant-pressure water supply device

Info

Publication number: CN210222575U
Application number: CN201921304282.9U
Authority: CN
Inventors: Jun Zhang; 章军; Bo Liu; 刘波
Original assignee: Anhui Hui Hui Automation Equipment Co Ltd
Current assignee: Anhui Hui Hui Automation Equipment Co Ltd
Priority date: 2019-08-12
Filing date: 2019-08-12
Publication date: 2020-03-31
Anticipated expiration: 2029-08-12

Abstract

The utility model discloses a constant pressure water supply installation, including cylinder, accurate relief pressure valve, pressure sensor, PID control module and syringe, the syringe includes piston, push rod, injection box, the bottom detachable of injection box installs the mount pad, the mount pad is seted up the through-hole and is communicated with the inner chamber of injection box, and the shower nozzle detachable of urea case is installed in the exit of through-hole, the push rod slidable installs at the top surface of injection box, and, the front end of push rod is fixed to be set up at the terminal surface of piston, and the end of push rod stretches out the injection box, the piston slidable just seals the inner chamber of injection box, the bottom intercommunication of injection box side is provided with the water injection pipeline; the cylinder detachable installs the top surface at the injection box to the tailpiece of the piston rod portion of cylinder links firmly with the end of push rod, thereby drives the piston and goes up and down, the utility model discloses can provide constant voltage and go out water, be particularly suitable for shower nozzle flow experiment and use.

Description

Constant-pressure water supply device

Technical Field

The utility model relates to a detection device's for commercial car accessory technical field specifically is a constant pressure water supply installation.

Background

A urea box is required to be used on a common automobile of the diesel engine, urea is provided by a spray head in the urea box, and the urea is hydrolyzed to generate ammonia gas which reacts with nitrogen oxides in automobile exhaust to generate water and nitrogen, so that the emission of nitric oxide and nitrogen dioxide in the tail gas of the diesel engine is reduced. Most of the existing methods for measuring the flow rate of the spray head use a flow sensor for detection, but the flow sensor is expensive and generally has high use cost.

It has been devised to obtain the flow rate of the head by detecting the volume of liquid per unit time. The mode has low cost, easier popularization and good market prospect. However, the mode has higher requirement on the outlet water pressure of the spray head, the outlet water pressure of the spray head is required to be ensured to be constant, and a constant-pressure water spraying device suitable for a flow detection test of a urea box spray head for a diesel vehicle does not exist in the market at present.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a constant voltage water supply installation can go out water by the constant voltage to satisfy the experimental requirement of flow detection of the automobile-used urea case shower nozzle of diesel oil.

In order to achieve the above object, the utility model provides a following technical scheme: the utility model provides a constant pressure water supply installation, includes cylinder, accurate relief pressure valve, pressure sensor, PID control module and syringe, wherein:

the injector comprises a piston, a push rod and an injection box, wherein the bottom of the injection box is detachably provided with a mounting seat, the mounting seat is provided with a through hole communicated with the inner cavity of the injection box, a spray head of the urea box is detachably mounted at an outlet of the through hole, the push rod is slidably mounted on the top surface of the injection box, the front end of the push rod is fixedly arranged on the end surface of the piston, the tail end of the push rod extends out of the injection box, the piston is slidable and seals the inner cavity of the injection box, and the bottom of the side surface of the injection box is communicated with a;

the cylinder is detachably arranged on the top surface of the injection box, and the end part of a piston rod of the cylinder is fixedly connected with the tail end of the push rod so as to drive the piston to lift;

the pressure sensor is arranged at the bottom of the side surface of the injection box and detects the water pressure in the injection box;

the PID control module can acquire water pressure information detected by the pressure sensor, and inputs a control instruction to the precise pressure reducing valve after processing the water pressure information so as to control the cylinder.

Preferably, a first filter is detachably mounted on the side surface of the mounting seat.

Preferably, a second filter is detachably arranged on the water injection pipeline.

Preferably, the model number of the PID control module is SIEMENS PLC CPU: 1215C.

Preferably, the pressure Sensor is a Micro Sensor: MPM480-0-1.0 MPa-V-22-B1-C1A.

Preferably, the signal of the precision pressure reducing valve is BELLOFRAM: 960-029-000.

Compared with the prior art, the beneficial effects of the utility model are as follows:

the device is particularly suitable for being used in the flow detection test of the urea box nozzle for the diesel vehicle, and can provide constant-pressure water. The utility model discloses use the cylinder as the power that promotes, promote the inner chamber removal of piston along the injection case, in order to provide the play water of suitable pressure, the water injection pipeline can pour into the water that detects the usefulness into to the inner chamber of injection case, pressure sensor can detect the water pressure in the inner chamber, the cylinder can constantly promote the piston and remove, in order to pass through the shower nozzle with water and discharge, pressure sensor constantly detects the water pressure of inner chamber, and send this water pressure to PID control module, PID control module is according to the threshold value that sets for in advance, and through PID control principle, send out the instruction to accurate relief pressure valve, in order to reach the purpose of control cylinder indentation, thereby the hydraulic purpose of adjustment inner chamber.

Drawings

Fig. 1 is one of the schematic perspective views of the present invention;

fig. 2 is a second perspective view of the present invention;

fig. 3 is a rear view of the present invention;

fig. 4 is a sectional view taken along line a-a of the front view of the present invention;

fig. 5 is a control schematic diagram of the present invention.

In the figure: the device comprises an air cylinder-1, a precision pressure reducing valve-2, a pressure sensor-3, a PID control module-4, an injector-5, a piston-6, a push rod-7, an injection box-8, a mounting seat-9, an inner cavity-10, a spray head-11, a water injection pipeline-12, a sealing ring-13, an end cover-14, a slide hole-15, a support rod-16, a first filter 17 and a second filter 18.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Referring to the drawings, the utility model provides a technical scheme: the utility model provides a constant pressure water supply installation, includes cylinder 1, accurate relief pressure valve 2, pressure sensor 3, PID control module 4 and syringe 5, wherein:

the injector 5 comprises a piston 6, a push rod 7 and an injection box 8, wherein a mounting seat 9 is detachably mounted at the bottom of the injection box 8, the mounting seat 9 is provided with a through hole communicated with an inner cavity 10 of the injection box 8, a spray head 11 of the urea box is detachably mounted at an outlet of the through hole, the push rod 7 is slidably mounted on the top surface of the injection box 8, the front end of the push rod 7 is fixedly arranged on the end surface of the piston 6, the tail end of the push rod 7 extends out of the injection box 8, the piston 6 can slide and seal the inner cavity 10 of the injection box 8, a water injection pipeline 12 is communicated with the bottom of the side surface of the injection box 8, and a sealing ring 13 is arranged on the side surface of the piston 6, so that the piston 6 can slide up and down in the. The top surface of the injection box 8 is opened and arranged, an end cover 14 is detachably mounted to block the top of the injection box 8, a sliding hole 15 is formed in the center of the end cover 14, the push rod 7 penetrates through the sliding hole 15, and a sealing assembly can be arranged in the sliding hole 15 and is provided with a sealing ring for further sealing the inner cavity 10 of the injection box 8.

The cylinder 1 is detachably mounted on the top surface of the injection box 8, the end part of a piston rod of the cylinder 1 is fixedly connected with the tail end of the push rod 7, so that the piston 6 is driven to ascend and descend, power for moving the piston 6 comes from the cylinder 1, and the cylinder 1 is detachably mounted above the injection box 8 through a plurality of support rods 16.

The pressure sensor 3 is arranged at the bottom of the side face of the injection box 8 and used for detecting the water pressure in the injection box 8, the pressure sensor 3 is arranged at the bottom of the side face of the injection box 8, on one hand, the position is the tail end of the stroke of the piston 6, the pressure sensor 3 can detect the water pressure of the whole stroke of the piston 6, and on the other hand, the position is close to the mounting seat 9 and used for detecting the water pressure and is closest to the water pressure of the spray head 11.

The PID control module 4 can acquire the water pressure information detected by the pressure sensor 3, and inputs a control instruction to the precision pressure reducing valve 2 after processing the water pressure information so as to control the locking of the cylinder 1.

Specifically, a first filter 17 and a second filter 18 are detachably mounted on the side surface of the mounting seat 9 and the water injection pipeline 12 respectively.

And the PID control module (proportion-integration-differentiation control module) consists of a proportion unit (P), an integration unit (I) and a differentiation unit (D). Through setting Kp, Ki and Kd. The PID control module is primarily suited for systems that are substantially linear and have a dynamic characteristic that does not change over time.

The PID block inside SIEMENS PLC is actually called to implement PID control.

The PID control module 4 is internally provided with a threshold value in advance, the pressure sensor 3 detects the water pressure of the inner cavity 10 in real time and transmits the water pressure to the PID control module 4, the PID control module 4 can compare the obtained real-time water pressure information with the threshold value, if the detected water pressure information is greater than the threshold value, the PID control module 4 sends a command to the precision pressure reducing valve 2, the precision pressure reducing valve 2 controls the speed of the cylinder 1 for reducing the advancing speed of the piston rod so as to adjust the water pressure in the inner cavity 10, and if the detected water pressure information is less than the threshold value, the precision pressure reducing valve 2 controls the speed of the cylinder 1 for accelerating the advancing.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. A constant-pressure water supply device is characterized in that: including cylinder, accurate relief pressure valve, pressure sensor, PID control module and syringe, wherein:

the PID control module acquires water pressure information detected by the pressure sensor, and inputs a control instruction to the precision pressure reducing valve after processing the water pressure information so as to control the cylinder.

2. The constant pressure water supply apparatus as claimed in claim 1, wherein: the side surface of the mounting seat is detachably provided with a first filter.

3. The constant pressure water supply apparatus as claimed in claim 2, wherein: and a second filter is detachably arranged on the water injection pipeline.

4. The constant pressure water supply apparatus as claimed in claim 3, wherein: the model of the PID control module is SIEMENS PLC CPU: 1215C.

5. The constant pressure water supply apparatus as claimed in claim 4, wherein: the model of the pressure Sensor is Micro Sensor: MPM480-0-1.0 MPa-V-22-B1-C1A.

6. The constant pressure water supply apparatus as claimed in claim 5, wherein: the signal of the precision pressure reducing valve is BELLOFRAM: 960-029-000.