Air pressure testing device for heptafluoropropane steel cylinder

Abstract

The utility model discloses an air pressure testing device for a heptafluoropropane steel cylinder, which comprises a high-pressure nitrogen cylinder for testing the air pressure of a steel cylinder body, a mounting pipe is arranged on the steel cylinder body, and a connecting pipe is arranged on the high-pressure nitrogen cylinder. The adjusting assembly is arranged between the mounting pipe and the connecting pipe and used for pressure communication adjustment in the air pressure testing process. Through mutual cooperation of the rotating assembly, the friction speed limiting assembly and the adjusting assembly, when pressure is adjusted in the testing process, friction resistance can be generated for rotation of the rotating rod, the rotating rod and the ball valve are prevented from rotating too fast in the adjusting process, the detection result is guaranteed, meanwhile, the risk in the detection process is reduced, and the detection efficiency can be improved under the emergency condition. Friction resistance in the adjusting process is relieved through state switching, rapid rotation control is conducted on the ball valve in the valve body through the rotating assembly, and accidents are avoided.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of heptafluoro-propane steel cylinder detection, specifically to a heptafluoro-propane steel cylinder gas testing pressure device. BACKGROUND

[0002] The heptafluoro-propane steel cylinder gas testing pressure device is a special equipment for detecting the pressure resistance of the steel cylinder in the heptafluoro-propane fire extinguishing system.

[0003] During the detection of the heptafluoro-propane steel cylinder using the heptafluoro-propane steel cylinder gas testing pressure device, the valve body is connected to the high-pressure nitrogen cylinder and the steel cylinder to be detected, and the gas pressure of the detection is adjusted by rotating the valve body. However, due to negligence or inexperience in operation, the ball valve inside the valve body rotates too fast, causing the detection pressure to suddenly rise or fall, affecting the detection results and increasing the risk during the detection process.

[0004] Therefore, there is an urgent need for a heptafluoro-propane steel cylinder gas testing pressure device to solve the above problems. UTILITY MODEL CONTENTS

[0005] The utility model aims to provide a heptafluoro-propane steel cylinder gas testing pressure device to solve the problems raised in the background art.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical scheme: a heptafluoro-propane steel cylinder gas testing pressure device, comprising a high-pressure nitrogen cylinder for testing the gas pressure of the steel cylinder body, an installation pipe is provided on the steel cylinder body, and a connecting pipe is provided on the high-pressure nitrogen cylinder; further comprising an adjusting assembly provided between the installation pipe and the connecting pipe for pressure communication adjustment during the gas pressure test;

[0007] The adjusting assembly comprises a valve body, the two ends of the valve body are detachably connected to the installation pipe and the connecting pipe through threads, a rotating rod for rotating the ball valve inside the valve body is rotatably connected to the valve body, and a rotating assembly for rotating the rotating rod and a friction speed limiting assembly for limiting the speed during rotation are provided on the rotating rod.

[0008] The rotating assembly comprises a spline hole opened in the rotating rod, a spline shaft is slidably connected to the spline hole, and a driving pin is fixedly connected to one end of the spline shaft.

[0009] The friction speed limiting assembly comprises a friction ring fixedly sleeved on the outer side of the spline shaft, a friction block is provided on the outer side of the friction ring, an arc-shaped groove for abutting against the outer side of the friction ring is provided at the front end of the friction block, an elastic assembly for elastically pressing the friction block is provided on the valve body, and the arc-shaped groove on the friction block abuts against the outer side of the friction ring under the elastic pressing of the elastic assembly.

[0010] The elastic assembly comprises a support fixed to the valve body, a plurality of sleeves fixedly connected on the support, a sliding rod slidingly connected on the sleeve, one end of the sliding rod fixed to one side of a friction block, and a mounting spring sleeved on the outside of the sleeve and abutting against the support and the friction block at both ends.

[0011] The lower end of the friction block is provided with a slope for abutting against the end of the friction ring to drive.

[0012] The outside of the spline shaft is sleeved with a reset spring, and both ends of the reset spring are connected with the friction ring and the rotating rod.

[0013] Compared with the prior art, the beneficial effects of the utility model are:

[0014] The seven-fluoropropane steel cylinder gas testing pressure device of the utility model, through the mutual cooperation of the rotating assembly, the friction speed limiting assembly and the adjusting assembly, when the pressure is adjusted in the testing process, not only can the friction resistance of the rotating rod be generated to avoid the too fast rotation of the rotating rod and the ball valve in the adjusting process, the detection result is ensured and the risk in the detection process is reduced, but also in the case of emergency, the friction resistance in the adjusting process is removed through the switching of the state, the ball valve in the valve body is quickly rotated and controlled through the rotating assembly, and the occurrence of the accident is avoided. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 It is the overall appearance structure schematic view of the utility model;

[0016] Figure 2 It is the adjusting assembly structure schematic view of the utility model;

[0017] Figure 3 It is the rotating assembly structure schematic view of the utility model;

[0018] Figure 4 It is the friction speed limiting assembly structure schematic view of the utility model;

[0019] Figure 5 It is the telescopic guide assembly structure schematic view of the utility model.

[0020] In the drawing: 101, high-pressure nitrogen cylinder; 102, connecting pipe; 103, steel cylinder body; 104, mounting pipe; 201, valve body; 202, rotating rod; 301, spline hole; 302, spline shaft; 303, driving pin; 401, friction ring; 402, friction block; 403, arc-shaped groove; 501, support; 502, sleeve; 503, sliding rod; 504, mounting spring; 6, slope; 7, reset spring. DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of the utility model.

[0022] Please refer to Figures 1-5 The utility model provides a kind of heptafluoro-propane cylinder gas testing pressure device, including the high-pressure nitrogen cylinder 101 for carrying out gas testing pressure to cylinder body 103, installation pipe 104 is provided on cylinder body 103, connecting pipe 102 is provided on high-pressure nitrogen cylinder 101;It also includes the adjusting assembly for pressure communication adjustment in the process of gas testing pressure between installation pipe 104 and connecting pipe 102;

[0023] Adjusting assembly includes valve body 201, two ends of valve body 201 are detachably connected with installation pipe 104 and connecting pipe 102 by screwing, valve body 201 is rotatably connected with the rotary rod 202 for the rotation of ball valve inside valve body 201, rotary rod 202 is provided with rotation assembly for the rotation of rotary rod 202 and friction speed limiting assembly for friction speed limiting in the process of rotation;

[0024] It is worth noting here that; ball valve is provided in valve body 201, the flow on valve body 201 is controlled by the rotation of ball valve, one end of rotary rod 202 is fixed with ball valve;

[0025] It needs to be explained here that: through the mutual cooperation of rotation assembly and friction speed limiting assembly and adjusting assembly, when pressure is adjusted in the process of testing, both friction resistance can be generated to the rotation of rotary rod 202, to avoid that rotary rod 202 and ball valve rotate too fast in the process of adjustment, to ensure the detection result while reducing the risk in the detection process, and in emergency, the friction resistance in the process of adjustment can be removed by switching state, the internal ball valve of valve body 201 is controlled by rotation assembly to rotate fast, to avoid the occurrence of accident.

[0026] Rotation assembly includes spline hole 301 opened in rotary rod 202, spline shaft 302 is slidably connected on spline hole 301, one end of spline shaft 302 is fixedly connected with driving pin 303;

[0027] It needs to be explained here that: by driving driving pin 303, spline shaft 302 is driven to rotate, in the process of rotation of spline shaft 302, spline shaft 302 and spline hole 301 are connected to drive, to drive rotary rod 202 to rotate.

[0028] The friction speed limiting assembly comprises a friction ring 401 fixed on the outside of the spline shaft 302, the outside of the friction ring 401 is provided with a friction block 402, the front end of the friction block 402 is provided with an arc-shaped groove 403 for abutting against the outside of the friction ring 401, the valve body 201 is provided with an elastic assembly for elastically extruding the friction block 402, and the arc-shaped groove 403 on the friction block 402 abuts against the outside of the friction ring 401 under the elastic extrusion of the elastic assembly;

[0029] It should be noted that: through the elastic extrusion of the elastic assembly, the arc-shaped groove 403 on the friction block 402 abuts against the outside of the friction ring 401, and through the friction resistance of the friction speed limiting assembly, the rotating rod 202 and the ball valve are prevented from rotating too fast during adjustment, so as to ensure the detection result and reduce the risk in the detection process.

[0030] The elastic assembly comprises a support 501 fixed on the valve body 201, a plurality of sleeves 502 are fixedly connected to the support 501, a sliding rod 503 is slidably connected to the sleeve 502, one end of the sliding rod 503 is fixed to one side of the friction block 402, a mounting spring 504 is sleeved on the outside of the sleeve 502, and both ends of the mounting spring 504 abut against the support 501 and the friction block 402 respectively;

[0031] It should be noted that: through the interaction between the sleeves 503 and the sliding rods 503 between the support 501 and the friction block 402, the telescopic guide of the friction block 402 after being stressed is facilitated, and through the elastic force of the spring 504, the friction block 402 and the outside of the friction ring 401 are kept in abutment.

[0032] The lower end of the friction block 402 is provided with a slope 6 for abutting against and driving the end of the friction ring 401, the outside of the spline shaft 302 is sleeved with a reset spring 7, and both ends of the reset spring 7 are connected with the friction ring 401 and the rotating rod 202 respectively;

[0033] It should be noted that: through the driving pin 303, when the spline shaft 302 slides towards the inside of the spline hole 301, the reset spring 7 is extruded and deformed to generate elastic force by the friction ring 401, and when the spline shaft 302 is not extruded and pushed, the reset spring 7 is elastically pushed to reset the friction ring 401 and the spline shaft 302, in the resetting process, the end of the friction ring 401 abuts against the slope 6, the friction block 402 is pushed to shrink, and through the shrinkage of the friction block 402, the friction ring 401 and the spline shaft 302 are normally reset.

[0034] Working principle: in the process of detecting the gas pressure of the steel cylinder of heptafluoro-propane, the installation pipe 104 on the steel cylinder body 103 and the connecting pipe 102 on the high-pressure nitrogen cylinder 101 are connected with the two ends of the valve body 201 through threaded connection, after the connection is completed, the driving pin 303 is driven to drive the spline shaft 302 to rotate, in the process of rotating the spline shaft 302, the spline shaft 302 and the spline hole 301 are connected and driven to rotate the rotating rod 202, so as to drive the ball valve in the valve body 201 to rotate and control the pressure change in the pressure test process;

[0035] In the process of rotating the spline shaft 302 to drive the rotating rod 202, the friction ring 401 outside the spline shaft 302 is driven to rotate synchronously, in the process of rotating the friction ring 401, the arc-shaped groove 403 on the friction block 402 is pushed by the elastic assembly to keep in contact with the outside of the friction ring 401, so as to generate friction resistance to the rotation of the friction ring 401 and the spline shaft 302, through the friction resistance, the rotating rod 202 and the ball valve are prevented from rotating too fast in the adjusting process, the detection result is ensured, and the risk in the detection process is reduced;

[0036] When the emergency pressure reduction is needed in the emergency situation such as cylinder leakage, detection equipment failure, fire or explosion danger and the like, the valve body 201 needs to be quickly closed, the spline shaft 302 is slid towards the inside of the spline hole 301 through the driving pin 303, in the process of sliding the spline shaft 302, the friction ring 401 is not in contact with the friction block 402, the friction resistance in the adjusting process is removed, the ball valve in the valve body 201 is quickly rotated and controlled through the rotating assembly, and the accident is avoided.

[0037] It is obvious for those skilled in the art that the utility model is not limited to the details of the above-mentioned exemplary embodiments, and the utility model can be realized in other specific forms without departing from the spirit or basic characteristics of the utility model. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-limiting, the scope of the utility model is defined by the appended claims instead of the above description, therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the utility model. Any reference signs in the claims should not be regarded as limiting the claims.

Claims

1. A pressure testing device for a heptafluoropropane cylinder, comprising: A high-pressure nitrogen cylinder (101) is used to test the pressure of a gas cylinder body (103). The gas cylinder body (103) is provided with an installation pipe (104), and the high-pressure nitrogen cylinder (101) is provided with a connecting pipe (102). Its characteristic is that it further includes: A regulating component for pressure connection regulation during air pressure testing, located between the installation pipe (104) and the connecting pipe (102); The regulating component includes a valve body (201), the two ends of which are detachably connected to the mounting pipe (104) and the connecting pipe (102) respectively by means of threads. A rotating rod (202) for rotating the ball valve inside the valve body (201) is rotatably connected to the valve body (201). The rotating rod (202) is provided with a rotating component for rotating the rotating rod (202) and a friction limiting component for limiting the friction speed during the rotation.

2. The pressure testing device for a heptafluoropropane cylinder according to claim 1, characterized in that: The rotating assembly includes a spline hole (301) opened inside the rotating rod (202), a spline shaft (302) is slidably connected to the spline hole (301), and a drive pin (303) is fixedly connected to one end of the spline shaft (302).

3. The pressure testing device for a heptafluoropropane cylinder according to claim 2, characterized in that: The friction speed limiting component includes a friction ring (401) sleeved and fixed to the outside of the spline shaft (302). A friction block (402) is provided on the outside of the friction ring (401). The front end of the friction block (402) is provided with an arc-shaped groove (403) for abutting against the outside of the friction ring (401). The valve body (201) is provided with an elastic component for elastically squeezing the friction block (402), and the arc-shaped groove (403) on the friction block (402) abuts against the outside of the friction ring (401) under the elastic squeezing of the elastic component.

4. The pressure testing device for a heptafluoropropane cylinder according to claim 3, characterized in that: The elastic component includes a bracket (501) fixed to the valve body (201), a plurality of sleeves (502) are fixedly connected to the bracket (501), a slide rod (503) is slidably connected to the sleeve (502), one end of the slide rod (503) is fixed to one side of the friction block (402), and a mounting spring (504) is sleeved on the outside of the sleeve (502), with both ends of the mounting spring (504) abutting against the bracket (501) and the friction block (402) respectively.

5. The pressure testing device for a heptafluoropropane cylinder according to claim 3, characterized in that: The lower end of the friction block (402) is provided with an inclined surface (6) for abutting against the end of the friction ring (401) for transmission.

6. The pressure testing device for a heptafluoropropane cylinder according to claim 3, characterized in that: A return spring (7) is sleeved on the outside of the spline shaft (302), and the two ends of the return spring (7) are connected to the friction ring (401) and the rotating rod (202) respectively.

Images