Pressure test valve

Abstract

The utility model provides a pressure test valve, and belongs to the technical field of valves. The problem that an existing pressure regulator is large in occupied space is solved. The pressure test valve comprises a valve body with a water passing channel and a pressure gauge arranged outside the valve body, a water inlet and a water outlet are formed in the two ends of the water passing channel respectively, a pressure regulating valve used for regulating water inlet pressure is arranged at the water inlet, a switch valve used for controlling opening and closing of the water outlet is arranged at the water outlet, and the switch valve comprises a switch knob and a tubular water outlet end. The switch knob is located outside the valve body, and the pressure gauge and the switch knob are distributed on the two sides of the valve body. An annular groove is formed between the outer wall of the water outlet end and the inner wall of the water outlet; a water passing hole for communicating the inner cavity of the water outlet end with the annular groove is formed in the side wall of the water outlet end; the valve body is further provided with a strip-shaped flow channel, the two ends of the strip-shaped flow channel are an inlet and an outlet respectively, the inlet is communicated with the annular groove, and the detection end of the pressure gauge is installed in the outlet. The pressure test valve is small in occupied space.

Description

Technical Field

[0001] The utility model belongs to the technical field of valves and relates to a pressure test valve. Background Art

[0002] The pressure test valve is a pressure control device whose main function is to automatically adjust the flow rate of the medium in the pipeline system to maintain the pressure of the pipeline system or equipment working stably within the set range.

[0003] An existing pressure test valve, such as a household gas pressure regulator disclosed in the China Patent Library (application number: 202221745131.9), includes a pressure reducing valve body, a connecting pipe, an adjusting knob, a first threaded sleeve and a pressure gauge, wherein a pressure gauge is arranged on the pressure reducing valve body, an adjusting knob is arranged on the pressure reducing valve body on the side of the pressure gauge, and a connecting pipe is arranged on the pressure reducing valve body on the side of the adjusting knob, a first threaded sleeve is fixed on the pressure reducing valve body on the side of the connecting pipe, and a fixed sleeve is threadedly sleeved on the first threaded sleeve, a detection cover cloth is fixed on the side of the fixed sleeve away from the adjusting knob, and a fixed elastic band is fixed on the side of the detection cover cloth away from the fixed sleeve.

[0004] In order to prevent over-pressure fluid or low-pressure fluid from entering the user's equipment, a switch valve is generally set between the pressure reducing valve body and the pressure gauge, and the three are distributed axially in sequence, resulting in the entire pressure regulator being too long and occupying a large space. Utility Model Content

[0005] The utility model aims to solve the above problems in the prior art and proposes a pressure test valve, which solves the technical problem of how to shorten the length.

[0006] The purpose of the utility model can be achieved through the following technical solutions: a pressure test valve, comprising a valve body with a water passage and a pressure gauge arranged outside the valve body, the two ends of the water passage are respectively a water inlet and a water outlet, a pressure regulating valve for adjusting the water inlet pressure is provided at the water inlet, and a switch valve for controlling the opening and closing of the water outlet is provided at the water outlet, the switch valve comprises a switch knob and a tubular water outlet end, and the switch knob is outside the valve body, characterized in that the pressure gauge and the switch knob are distributed on both sides of the valve body; an annular groove is formed between the outer wall of the water outlet end and the inner wall of the water outlet, and a water hole is provided on the side wall of the water outlet end to connect the inner cavity of the water outlet end with the annular groove; a strip flow channel is also provided on the valve body, and the two ends of the strip flow channel are respectively an inlet and an outlet, the inlet is connected to the annular groove, and the detection end of the pressure gauge is installed in the outlet.

[0007] When in use, water enters from the water inlet, enters the switch valve after the pressure is adjusted by the pressure regulating valve and is discharged from the water outlet. Among them, part of the water in the water outlet will enter the strip flow channel through the water hole for the pressure gauge to detect the pressure; when the pressure value detected by the pressure gauge is too large or too small, first close the switch valve, then adjust the pressure regulating valve to adjust the water inlet pressure, and reopen the switch valve after the pressure adjustment is completed.

[0008] With the cooperation of the water hole and the strip flow channel, the pressure gauge can be kept away from the switch valve and set in the middle of the valve body. At the same time, the pressure gauge and the knob are arranged on both sides of the valve. This can effectively shorten the length of the valve body, make the pressure test valve structure more compact, and reduce space occupancy.

[0009] In the above-mentioned pressure test valve, the above-mentioned strip-shaped flow channel is composed of a detection hole opened on the outer wall of the valve body and a flow channel body arranged in the valve body and roughly in a U-shape. The detection hole is the above-mentioned outlet, one end of the flow channel body is connected to the detection hole, and the other end of the flow channel body is the above-mentioned inlet. The strip-shaped flow channel is composed of the detection hole and the roughly U-shaped flow channel body, and has the advantages of easy processing and stable operation.

[0010] In the above-mentioned pressure test valve, an annular groove body 1 is provided on the outer wall of the water outlet end, and an annular groove body 2 is provided on the inner wall of the water outlet, and the above-mentioned annular groove is formed between the groove body 1 and the groove body 2 to effectively expand the volume of the annular groove, play a buffering role, make water flow more smoothly into the strip flow channel, and improve the detection accuracy of the pressure gauge.

[0011] In the above-mentioned pressure test valve, there are at least two water holes which are evenly distributed along the circumference of the water outlet end to speed up the flow rate and improve the detection efficiency.

[0012] In the above-mentioned pressure test valve, the pressure regulating valve includes an adjusting knob arranged outside the valve body. The adjusting knob and the switch knob are arranged on the same side of the valve body and distributed along the axial direction of the water outlet. In this way, in actual design, the valve body can be made shorter through reasonable layout, thereby further reducing the space occupied by the pressure test valve.

[0013] In the above-mentioned pressure test valve, the type of the switch valve is a ball valve, which includes a valve stem, two valve seats arranged in the water outlet, and a ball core arranged between the two valve seats. The outer wall of the valve body is penetrated with a mounting hole 1 connected to the water outlet, the valve stem is in the mounting hole 1, and a seal is formed between the outer wall of the valve stem and the hole wall of the mounting hole 1. The inner end of the valve stem is connected to the ball core, and the outer end of the valve stem extends out of the mounting hole 1 and is connected to the above-mentioned switch knob; a water outlet pipe is inserted and fixed in the water outlet, and the water outlet pipe is the above-mentioned water outlet end; annular steps are provided on the inner wall of the water outlet and the end face of the water outlet pipe, and the two valve seats are respectively stuck in the two annular steps. The above-mentioned design is convenient for the installation of the switch valve.

[0014] In the above-mentioned pressure test valve, the outer end of the water outlet pipe extends out of the valve body, so as to facilitate its connection with the water supply equipment.

[0015] In the above-mentioned pressure test valve, the inner end of the water outlet pipe is provided with an external thread, and the inner end of the water outlet pipe is screwed into the water outlet, the outer wall of the water outlet pipe forms a seal with the inner wall of the water outlet through a sealing ring, and the above-mentioned annular groove is between the sealing ring and the external thread. With the above-mentioned design, the installation can be completed by simply rotating the water outlet pipe, which further facilitates assembly.

[0016] In the above-mentioned pressure test valve, an annular shoulder is formed on the outer wall of the outer end of the water outlet pipe, and the annular shoulder is pressed on the valve body to limit the installation of the water outlet pipe, so that the water outlet pipe can be installed in place at one time, further facilitating assembly.

[0017] In the above-mentioned pressure test valve, a positioning step in the shape of an annulus and facing the annular shoulder is provided on the outer wall of the valve body. The sealing ring is sleeved on the water outlet pipe, and the two end faces of the sealing ring are respectively pressed tightly against the bottom face of the positioning step and the end face of the annular shoulder to enhance the sealing performance formed between the valve body and the water outlet pipe and ensure the stable operation of the pressure test valve.

[0018] Compared with the existing technology, this pressure test valve has the following advantages:

[0019] 1. With the cooperation of the water hole and the strip flow channel, the pressure gauge can be kept away from the switch valve and set in the middle of the valve body. At the same time, the pressure gauge and the knob are distributed on both sides of the valve. This can effectively shorten the length of the valve body, make the pressure test valve structure more compact, and reduce space occupancy.

[0020] 2. The annular groove is composed of a groove body 1 arranged on the outer wall of the water outlet and a groove body 2 arranged on the inside of the water outlet, so as to effectively expand the volume of the annular groove, play a buffering role, make the water flow more smoothly into the strip flow channel, and improve the detection accuracy of the pressure gauge. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a three-dimensional schematic diagram of the pressure test valve.

[0022] Figure 2 It is a cross-sectional schematic diagram of the pressure test valve.

[0023] Figure 3 It is a schematic diagram of a strip flow channel.

[0024] In the figure, 1, valve body; 1a, water passage; 1b, strip flow channel; 1b1, detection hole; 1b2, flow channel body; 1c, installation hole 2; 1d, drainage hole; 1e, installation hole 1; 2, pressure gauge; 3, pressure regulating valve; 3a, connecting rod; 3a1, limit seat; 3b, pull rod; 3b1, arc piece; 3c, adjusting knob; 4, switch valve; 4a, switch knob; 4b, water outlet; 4b1, water hole; 4b2, groove body 1; 4b3, annular shoulder; 4c, valve stem; 4d, valve seat; 4e, ball core; 4f, sealing ring; 5, annular groove. DETAILED DESCRIPTION

[0025] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

[0026] like Figure 1 and Figure 2 As shown, the pressure test valve includes a valve body 1 having a water passage 1 a and a pressure gauge 2 arranged outside the valve body 1 .

[0027] Specifically,

[0028] The water passage 1a is strip-shaped, and the two ends of the water passage 1a are a water inlet and a water outlet, respectively. The water inlet is provided with a pressure regulating valve 3 for adjusting the water inlet pressure; the water outlet is provided with a switch valve 4 for controlling the opening and closing of the water outlet, the switch valve 4 includes a switch knob 4a and a tubular water outlet end 4b, the switch knob 4a is used to control the opening and closing of the switch valve 4, and the switch knob 4a is outside the valve body 1.

[0029] like Figures 1 to 3 As shown, the pressure gauge 2 and the switch knob 4a are distributed on both sides of the valve body 1; an annular groove 5 is formed between the outer wall of the water outlet 4b and the inner wall of the water outlet, the annular groove 5 and the water outlet 4b are coaxially arranged, and a water hole 4b1 is provided on the side wall of the water outlet 4b to connect the inner cavity of the water outlet 4b to the annular groove 5. The valve body 1 is also provided with a strip flow channel 1b, the two ends of the strip flow channel 1b are respectively an inlet and an outlet, the inlet is connected to the annular groove 5, and the detection end of the pressure gauge 2 is installed in the outlet.

[0030] When in use, water enters from the water inlet, enters the switch valve 4 after the pressure is adjusted by the pressure regulating valve 3 and is discharged from the water outlet 4b, wherein part of the water in the water outlet 4b will enter the strip flow channel 1b through the water hole 4b1 for the pressure gauge 2 to detect the pressure; when the pressure value detected by the pressure gauge 2 is too large or too small, first close the switch valve 4, then adjust the pressure regulating valve 3 to adjust the water inlet pressure, and reopen the switch valve 4 after the pressure adjustment is completed.

[0031] With the cooperation of the water hole 4b1 and the strip flow channel 1b, the pressure gauge 2 can be kept away from the switch valve 4 and arranged in the middle position of the valve body 1. At the same time, the pressure gauge 2 and the knob are arranged on both sides of the valve. In this way, the length of the valve body 1 can be effectively shortened, the structure of the pressure test valve becomes more compact, and the space occupancy is reduced.

[0032] In this embodiment,

[0033] like Figure 3As shown, the structure of the strip flow channel 1b is as follows: the strip flow channel 1b is composed of a detection hole 1b1 opened on the outer wall of the valve body 1 and a flow channel body 1b2 arranged in the valve body 1 and roughly in the shape of a U. The detection hole 1b1 is the above-mentioned outlet, one end of the flow channel body 1b2 is connected to the detection hole 1b1, and the other end of the flow channel body 1b2 is the above-mentioned inlet. The strip flow channel 1b is composed of the detection hole 1b1 and the flow channel body 1b2 that is roughly in the shape of a U, and has the advantages of easy processing and stable operation.

[0034] like Figure 2 As shown, the annular groove 5 is formed as follows: an annular groove body 1 4b2 is opened on the outer wall of the water outlet 4b, an annular groove body 2 is opened on the inner wall of the water outlet, and the annular groove 5 is formed between the groove body 1 4b2 and the groove body 2 to effectively expand the volume of the annular groove 5, play a buffering role, make the water flow more smoothly into the strip flow channel 1b, and improve the detection accuracy of the pressure gauge 2. Preferably, there are at least two water holes 4b1 and they are evenly distributed along the circumference of the water outlet 4b to speed up the flow rate and improve the detection efficiency.

[0035] like Figure 2 As shown, the structure of the pressure regulating valve 3 is the prior art, and a brief introduction is given here: the water flow channel is roughly L-shaped, and the outer wall of the valve body 1 is penetrated by a mounting hole 1c connected to the water inlet and a drain hole 1d connected to the mounting hole 1c, wherein the drain hole 1d and the water outlet are arranged with parallel axes, the mounting hole 1c is arranged between the drain hole 1d and the water outlet, and the mounting hole 1c and the water inlet are arranged with parallel axes. The pressure regulating valve 3 includes a connecting rod 3a inserted into the mounting hole 1c, and the connecting rod 3a can slide along the axial direction of the mounting hole 1c. An O-ring is used to form a seal between the middle part of the connecting rod 3a and the inner wall of the second mounting hole 1c; a conical surface is used to cooperate between one end of the connecting rod 3a and the inner wall of the second mounting hole 1c to control the cutoff or connection between the drain hole 1d and the water inlet; a pull rod 3b is threadedly connected to the end of the second mounting hole 1c away from the water inlet, and the outer end of the pull rod 3b extends out of the valve body 1 and is connected to the adjusting knob 3c. Two arc pieces 3b1 are formed on the inner end surface of the pull rod 3b and are evenly distributed along the circumference of the pull rod 3b, and the axial cross-section of the arc piece 3b1 is L-shaped. A ring-shaped limit seat 3a1 is formed at the other end of the connecting rod 3a. The limit seat 3a1 is located between the two arc pieces 3b1, and the outer diameter of the limit seat 3a1 is larger than the minimum inner diameter of the arc piece 3b1, so that the connection rod 3a can be driven to slide up and down by rotating the pull rod 3b to adjust the gap between the two conical surfaces and achieve pressure regulation.

[0036] It is further explained that the adjusting knob 3c and the switch knob 4a are arranged on the same side of the valve body 1 and distributed along the axial direction of the water outlet end 4b. In this way, in actual design, the valve body 1 can be made shorter through reasonable layout, further reducing the space occupied by the pressure test valve.

[0037] like Figure 2As shown, the type of the switch valve 4 is a ball valve, which includes a valve stem 4c, two valve seats 4d arranged in the water outlet, and a ball core 4e arranged between the two valve seats 4d. The outer wall of the valve body 1 is penetrated with a mounting hole 1e connected to the water outlet, the valve stem 4c is in the mounting hole 1e, and the outer wall of the valve stem 4c forms a seal with the hole wall of the mounting hole 1e through an o-ring, the inner end of the valve stem 4c is connected to the ball core 4e, and the outer end of the valve stem 4c extends out of the mounting hole 1e and is connected to the above-mentioned switch knob 4a; a water outlet pipe is inserted and fixed in the water outlet, and the water outlet pipe is the above-mentioned water outlet end 4b; annular steps are provided on the inner wall of the water outlet and the end surface of the water outlet pipe, and the two valve seats 4d are respectively stuck in the two annular steps. The above-mentioned design facilitates the installation of the switch valve 4.

[0038] The installation method of the water outlet pipe is as follows: the outer end of the water outlet pipe extends out of the valve body 1, the inner end of the water outlet pipe is provided with an external thread, and the inner end of the water outlet pipe is screwed into the water outlet, the outer wall of the water outlet pipe forms a seal with the inner wall of the water outlet through the sealing ring 4f, and the annular groove 5 is located between the sealing ring 4f and the external thread. Further explanation, an annular shoulder 4b3 is formed on the outer wall of the outer end of the water outlet pipe, the annular shoulder 4b3 is coaxial with the water outlet pipe, and the annular shoulder 4b3 is pressed on the valve body 1, which is used for the installation limit of the water outlet pipe, so that the water outlet pipe can be installed in place at one time, which is further convenient for assembly.

[0039] The installation method of the sealing ring 4f is as follows: a positioning step in the shape of an annular ring and facing the annular shoulder 4b3 is opened on the outer wall of the valve body 1, the sealing ring 4f is sleeved on the water outlet pipe, and the two end faces of the sealing ring 4f are respectively pressed tightly against the bottom surface of the positioning step and the end face of the annular shoulder 4b3 to enhance the sealing performance formed between the valve body 1 and the water outlet pipe and ensure the stable operation of the pressure test valve.

[0040] The specific embodiments described herein are merely examples of the spirit of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in similar ways, but they will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

Claims

1. A pressure test valve, comprising a valve body (1) having a water passage (1a) and a pressure gauge (2) arranged outside the valve body (1), wherein the two ends of the water passage (1a) are a water inlet and a water outlet, respectively, a pressure regulating valve (3) for regulating the water inlet pressure is arranged at the water inlet, and a switch valve (4) for controlling the opening and closing of the water outlet is arranged at the water outlet, the switch valve (4) comprising a switch knob (4a) and a tubular water outlet end (4b), and the switch knob (4a) is located outside the valve body (1), characterized in that: The pressure gauge (2) and the switch knob (4a) are distributed on both sides of the valve body (1); an annular groove (5) is formed between the outer wall of the water outlet end (4b) and the inner wall of the water outlet, and a water hole (4b1) is provided on the side wall of the water outlet end (4b) so that the inner cavity of the water outlet end (4b) is connected to the annular groove (5); the valve body (1) is also provided with a strip flow channel (1b), the two ends of the strip flow channel (1b) are respectively an inlet and an outlet, the inlet is connected to the annular groove (5), and the detection end of the pressure gauge (2) is installed in the outlet.

2. The pressure test valve according to claim 1, characterized in that: The strip-shaped flow channel (1b) is composed of a detection hole (1b1) formed on the outer wall of the valve body (1) and a flow channel body (1b2) disposed in the valve body (1) and having a substantially U-shaped shape. The detection hole (1b1) is the above-mentioned outlet. One end of the flow channel body (1b2) is connected to the detection hole (1b1), and the other end of the flow channel body (1b2) is the above-mentioned inlet.

3. The pressure test valve according to claim 1 or 2, characterized in that: An annular groove body 1 (4b2) is provided on the outer wall of the water outlet end (4b), an annular groove body 2 is provided on the inner wall of the water outlet, and the annular groove (5) is formed between the groove body 1 (4b2) and the groove body 2.

4. The pressure test valve according to claim 3, characterized in that: There are at least two water holes (4b1) which are evenly distributed along the circumference of the water outlet end (4b).

5. The pressure test valve according to claim 1, characterized in that: The pressure regulating valve (3) comprises an adjusting knob (3c) arranged outside the valve body (1); the adjusting knob (3c) and the switch knob (4a) are arranged on the same side of the valve body (1) and are distributed along the axial direction of the water outlet end (4b).

6. The pressure test valve according to claim 1, characterized in that: The type of the switch valve (4) is a ball valve, comprising a valve stem (4c), two valve seats (4d) arranged in a water outlet, and a ball core (4e) arranged between the two valve seats (4d); a mounting hole (1e) communicating with the water outlet is penetrated through the outer wall of the valve body (1); the valve stem (4c) is in the mounting hole (1e), and a seal is formed between the outer wall of the valve stem (4c) and the hole wall of the mounting hole (1e); the inner end of the valve stem (4c) is connected to the ball core (4e), and the outer end of the valve stem (4c) extends out of the mounting hole (1e) and is connected to the switch knob (4a); a water outlet pipe is inserted and fixed in the water outlet, and the water outlet pipe is the water outlet end (4b) mentioned above; an annular step is provided on the inner wall of the water outlet and the end surface of the water outlet pipe, and the two valve seats (4d) are respectively inserted into the two annular steps.

7. The pressure test valve according to claim 6, characterized in that: The outer end of the water outlet pipe extends out of the valve body (1).

8. The pressure test valve according to claim 7, characterized in that: The inner end of the water outlet pipe is provided with an external thread, and the inner end of the water outlet pipe is threadedly connected to the water outlet, the outer wall of the water outlet pipe is sealed with the inner wall of the water outlet through a sealing ring (4f), and the annular groove (5) is located between the sealing ring (4f) and the external thread.

9. The pressure test valve according to claim 8, characterized in that: An annular stop shoulder (4b3) is formed on the outer wall of the outer end of the water outlet pipe, and the annular stop shoulder (4b3) is pressed on the valve body (1).

10. The pressure test valve according to claim 9, characterized in that: An annular positioning step is provided on the outer wall of the valve body (1) and is arranged opposite to the annular shoulder (4b3). The sealing ring (4f) is sleeved on the water outlet pipe, and the two end surfaces of the sealing ring (4f) are respectively pressed tightly against the bottom surface of the positioning step and the end surface of the annular shoulder (4b3).

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