Self-locking type pressure gauge connector

Abstract

The utility model relates to a self-locking pressure gauge joint, which comprises a joint body, a sealing block, a spring seat and a spring, a through flow guide hole is arranged in the joint body, a baffle ring is arranged on the wall of the flow guide hole and divides the flow guide hole into a first hole and a second hole which are communicated with each other, and a first internal thread which is matched and connected with a pressure gauge is arranged on the wall of the first hole; first external threads are arranged at the end, away from the first hole, of the connector body. The sealing block is T-shaped and comprises an end plate and a flow guide pipe which are connected with each other; the flow guide pipe is slidably installed in a center hole of the baffle ring, and a first fluid passing hole is formed in the side wall of the flow guide pipe. The end plate is arranged in the second hole, and a gap is reserved between the end plate and the hole wall of the second hole; the spring seat is fixed to the end of the connector body and located in the second hole, and a second fluid passing hole is formed in the spring seat. The spring is pressed between the end plate and the spring seat; compared with the prior art, the pressure gauge stop valve can effectively prevent fluid leakage when a pressure gauge is replaced, and compared with a pressure gauge stop valve, the pressure gauge stop valve is simpler in structure and lower in manufacturing cost.

Description

TECHNICAL FIELD

[0001] The utility model relates to pipeline sealing technical field, concretely relates to a self locking pressure gauge joint. BACKGROUND

[0002] Pressure gauge is used for the detection of fluid pressure, and is everywhere in the fields of heat pipe network, oil and gas transmission, water supply and gas supply system. When the pressure gauge is aged, damaged or the like, it needs to be replaced. In the prior art, a pressure gauge stop valve is installed in the fluid pipeline in a matched mode. In order to prevent fluid leakage, when the pressure gauge needs to be replaced, the stop valve needs to be closed to cut off the passage of fluid and the pressure gauge, then the pressure gauge is disassembled and replaced, and then the stop valve is opened. The operation of replacing the pressure gauge is relatively cumbersome and time-consuming, and the existing common stop valve, such as a needle valve, has a relatively complex structure and a high cost. SUMMARY

[0003] The utility model aims at the problems in the prior art that a pressure gauge stop valve is needed to prevent fluid leakage when the pressure gauge is replaced, and the existing common stop valve, such as a needle valve, has a relatively complex structure and a high cost, and provides a self locking pressure gauge joint.

[0004] In order to achieve the above-mentioned purpose, the utility model adopts the technical scheme that:

[0005] A self locking pressure gauge joint, comprising a joint body, a sealing block, a spring seat and a spring, the joint body is provided with a through flow guide hole, the flow guide hole wall is provided with a blocking ring, the blocking ring divides the flow guide hole into a first hole and a second hole in communication, the first hole wall is provided with a first internal thread matched with the pressure gauge; the end of the joint body away from the first hole is provided with a first external thread; the sealing block is T-shaped, comprising a connecting end plate and a flow guide pipe; the flow guide pipe is slidingly installed in the center hole of the blocking ring, the side wall of the flow guide pipe is provided with a first fluid through hole; the end plate is arranged in the second hole, and a gap is left between the end plate and the second hole wall; the spring seat is fixed to the end of the joint body and located in the second hole, and the spring seat is provided with a second fluid through hole; the spring is compressed between the end plate and the spring seat.

[0006] The utility model discloses adopt the preceding technical scheme, and the pressure gauge joint is connected with the pressure gauge through the first internal thread, and is connected with the fluid pipeline through the first external thread, when installing the pressure gauge, with the end of the pressure gauge being screwed into the first hole, the sealing block will abut against the flow guide pipe and push the sealing block to move, the spring is compressed, and the gap between the end plate and the retaining ring increases, the sealing is released, the fluid in the second hole flows into the flow guide pipe through the first fluid via hole and enters the pressure gauge, and the pressure measurement is realized, when disassembling the pressure gauge, with the end of the pressure gauge being screwed out of the first hole, the sealing block will move under the thrust of the spring, the gap between the end plate and the retaining ring decreases, and until the sealing is formed, the fluid is sealed in the second hole and cannot enter the pressure gauge, thereby avoiding the fluid leakage when disassembling the pressure gauge, compared with the prior art, in order to prevent the fluid leakage when replacing the pressure gauge, the pressure gauge stop valve needs to be matched, the structure of the common stop valve, such as the needle valve, is usually relatively complex, and the cost is relatively high, the utility model discloses can effectively prevent the fluid leakage when replacing the pressure gauge, thereby the pressure gauge stop valve can be cancelled, and the structure of the utility model discloses is simpler, and the manufacturing cost is lower.

[0007] Further, the sealing ring is sleeved on the flow guide pipe and arranged between the end plate and the retaining ring.

[0008] Further, the spring is matched with the gap of the second hole, so that the hole wall of the second hole limits the spring in the radial direction.

[0009] Further, the opposite sides of the end plate and the spring seat are respectively provided with a first limiting boss and a second limiting boss, one end of the spring is sleeved on the first limiting boss, and the other end of the spring is sleeved on the second limiting boss.

[0010] Further, the opposite ends of the end plate and the fixed block are respectively provided with a first limiting groove and a second limiting groove, one end of the spring is embedded in the first limiting groove, and the other end of the spring is embedded in the second limiting groove.

[0011] Further, a plurality of first fluid via holes are formed in the side wall of the flow guide pipe, and the plurality of first fluid via holes are uniformly arranged in the circumferential direction of the flow guide pipe.

[0012] Further, the second hole is provided with a second internal thread on a hole wall far from one end of the blocking ring, the spring seat is provided with a second external thread, and the spring seat is fixedly connected to the joint body through cooperation of the second internal thread and the second external thread.

[0013] Compared with the prior art, the utility model has the advantages that fluid leakage during replacement of the pressure gauge is effectively prevented, so that the pressure gauge stop valve can be cancelled, the structure is simpler, and the manufacturing cost is lower; during dismounting of the pressure gauge, the internal fluid passage of the joint is automatically closed, during mounting of the pressure gauge, the internal fluid passage of the joint is automatically opened, so that only the pressure gauge needs to be screwed and dismounted, the step of opening and closing the stop valve is saved, and operation is more convenient and time-saving. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 It is a sectional view of the utility model;

[0015] Figure 2 It is a sectional view of the joint body;

[0016] Figure 3 It is a sectional view of the sealing block;

[0017] Figure 4 It is a sectional view of the spring seat;

[0018] Figure 5 It is a sectional view of the second embodiment of the utility model;

[0019] Figure 6 It is a sectional view of the sealing block of the second embodiment;

[0020] Figure 7 It is a sectional view of the spring seat of the second embodiment;

[0021] Figure 8 It is a sectional view of the third embodiment of the utility model;

[0022] Figure 9 It is a sectional view of the sealing block of the third embodiment;

[0023] Figure 10 It is a sectional view of the spring seat of the third embodiment.

[0024] Marked in the figure: 1 - joint body, 11 - baffle ring, 111 - center hole, 12 - first hole, 121 - first internal thread, 13 - second hole, 131 - second internal thread, 14 - first external thread, 2 - sealing block, 21 - end plate, 211 - first limiting boss, 212 - first limiting groove, 22 - flow guide pipe, 221 - first fluid via hole, 3 - spring seat, 31 - second fluid via hole, 32 - second limiting boss, 33 - second limiting groove, 34 - second external thread, 4 - sealing ring, 5 - spring. DETAILED DESCRIPTION

[0025] The utility model will be explained in detail below in combination with the drawings.

[0026] In order to make the utility model's purpose, technical scheme and advantage more clearly, following combining with the drawing and example, the utility model is further explained in detail.It should be understood that the specific example described here is only used to explain the utility model, and is not used to limit the utility model.

[0027] A self-locking pressure gauge joint, as shown in Figures 1-4 The joint body 1 is provided with a through flow guide hole, the baffle ring 11 is arranged on the wall of the flow guide hole, the baffle ring 11 divides the flow guide hole into the first hole 12 and the second hole 13 in communication, the first hole 12 is provided with the first internal thread 121 matched with the pressure gauge; the end of the joint body 1 away from the first hole 12 is provided with the first external thread 14; the sealing block 2 is T-shaped, comprising the end plate 21 and the flow guide pipe 22 connected; the flow guide pipe 22 is slidingly installed in the center hole 111 of the baffle ring 11, the side wall of the flow guide pipe 22 is provided with the first fluid via hole 221; the end plate 21 is arranged in the second hole 13, and a gap is left between the end plate 21 and the wall of the second hole 13 to form a space for fluid to pass through; the spring seat 3 is fixed to the end of the joint body 1 and located in the second hole 13, and the spring seat 3 is provided with the second fluid via hole 31; the spring 5 is compressed between the end plate 21 and the spring seat 3; the end of the flow guide pipe 22 away from the end plate 21 extends into the first hole 12;

[0028] The flow guide pipe 22 is in clearance fit with the center hole 111 of the baffle ring 11; in order to make the fluid more easily flow into the first fluid via hole 221 in the pressure gauge installation state, the position of the first fluid via hole 221 on the flow guide pipe 22 is set as follows: when the pressure gauge is installed on the pressure gauge joint, the first fluid via hole 221 is located in the second hole 13;

[0029] In order to make the sealing effect between the end plate 21 and the blocking ring 11 better when the pressure gauge is disassembled, the self-locking pressure gauge connector further comprises a sealing ring 4, which is sleeved on the flow guide pipe 22 and arranged between the end plate 21 and the blocking ring 11; the sealing ring 4 is tightly sleeved on the flow guide pipe 22 and in contact with the end plate 21, when the end of the pressure gauge is installed in the first hole 12, the sealing ring 4 moves with the sealing block 2 in the process of the end of the pressure gauge pushing the sealing block 2 to move, and a gap appears between the sealing ring 4 and the blocking ring 11, so that fluid can flow through the gap and then flow into the flow guide pipe 22 through the first fluid through hole 221; the sealing ring 4 and the first fluid through hole 221 are staggered in the axial direction of the flow guide pipe 22, so as to avoid that the sealing ring 4 blocks the first fluid through hole 221;

[0030] A plurality of first fluid through holes 221 are formed in the side wall of the flow guide pipe 22, and the plurality of first fluid through holes 221 are uniformly arranged in the circumferential direction of the flow guide pipe 22;

[0031] The second hole 13 is provided with a second inner thread 131 at the end away from the blocking ring 11, and the spring seat 3 is provided with a second outer thread 34, and the spring seat 3 is fixedly connected to the connector body 1 through the cooperation of the second inner thread 131 and the second outer thread 34;

[0032] The two ends of the spring 5 abut against the end plate 21 and the spring seat 3 respectively, and the outer diameter size of the spring 5 is not limited, but in order to increase the stability of the spring 5 in the second hole 13, the spring 5 can be arranged in clearance fit with the second hole 13, so that the hole wall of the second hole 13 limits the spring 5 in the radial direction, that is, the outer diameter of the spring 5 is slightly smaller than the inner diameter of the second hole 13;

[0033] In addition, as shown in Figures 5-7 , the opposite sides of the end plate 21 and the spring seat 3 can be respectively provided with a first limiting boss 211 and a second limiting boss 32, one end of the spring 5 is sleeved on the first limiting boss 211, and the other end of the spring 5 is sleeved on the second limiting boss 32;

[0034] In addition, as shown in Figures 8-10 , the opposite ends of the end plate 21 and the fixed block 3 can be respectively provided with a first limiting recess 212 and a second limiting recess 33, one end of the spring 5 is embedded in the first limiting recess 212, and the other end of the spring 5 is embedded in the second limiting recess 33.

[0035] The utility model discloses adopt preceding technical scheme's, this pressure gauge joint is connected through first internal thread 121 with pressure gauge, is connected through first external thread 14 with fluid pipeline, when installing pressure gauge, with pressure gauge end portion screw into first hole 12, it will with sealing block 2's flow guide pipe 22 abut and push sealing block 2 remove, spring 5 is compressed while the clearance between end plate 21 and fender ring 11 increases, unseals, the fluid in second hole 13 flows into flow guide pipe 22 from first fluid via hole 221 and enters pressure gauge, realizes pressure measurement, when dismounting pressure gauge, with pressure gauge end portion screw out first hole 12, sealing block 2 will remove under the thrust of spring 5, the clearance between end plate 21 and fender ring 11 reduces, until forming seal, fluid is sealed in second hole 13 and cannot enter pressure gauge, thereby avoid fluid leakage when dismounting pressure gauge, compared with prior art, to prevent fluid leakage when replacing pressure gauge, need to be matched with pressure gauge stop valve, and the structure of the common stop valve, for example needle valve is usually more complex, and the cost is higher, adopt the utility model discloses can effectively prevent fluid leakage when replacing pressure gauge, thereby can cancel the setting pressure gauge stop valve, the structure of the utility model is simpler, and the manufacturing cost is lower, simultaneously, when dismounting pressure gauge, joint internal fluid passage is closed automatically, when installing pressure gauge, joint internal fluid passage is opened automatically, so just need to screw pressure gauge and can, save the step of opening and closing stop valve, and operation is more convenient and time -saving.

[0036] The above only is the preferred embodiment of the utility model, and does not use to limit the utility model, and any modification, equivalent replacement and improvement etc. that are made in the spirit and principle of the utility model should include in the protection scope of the utility model.

Claims

1. A self-locking pressure gauge connector, characterized in that: The connector body (1), sealing block (2), spring seat (3), and spring (5) are included. The connector body (1) has a through-hole, and a retaining ring (11) is provided on the wall of the through-hole. The retaining ring (11) divides the through-hole into a first hole (12) and a second hole (13) that are connected. The wall of the first hole (12) is provided with a first internal thread (121) that is connected to a pressure gauge. The end of the connector body (1) away from the first hole (12) is provided with a first external thread (14). The sealing block (2) is T-shaped and includes a connected end plate (5). 21) and guide tube (22); the guide tube (22) is slidably installed in the center hole (111) of the retaining ring (11), and a first fluid passage hole (221) is provided on the side wall of the guide tube (22); the end plate (21) is located in the second hole (13), and there is a gap between it and the wall of the second hole (13); the spring seat (3) is fixed at the end of the connector body (1) and located in the second hole (13), and a second fluid passage hole (31) is provided on the spring seat (3); the spring (5) is pressed between the end plate (21) and the spring seat (3).

2. The self-locking pressure gauge connector according to claim 1, characterized in that: It also includes a sealing ring (4), which is fitted onto the guide tube (22) and disposed between the end plate (21) and the retaining ring (11).

3. The self-locking pressure gauge connector according to claim 1 or 2, characterized in that: The spring (5) is fitted with the second hole (13) with a clearance, so that the hole wall of the second hole (13) forms a radial limit on the spring (5).

4. The self-locking pressure gauge connector according to claim 1 or 2, characterized in that: The end plate (21) and the spring seat (3) are respectively provided with a first limiting boss (211) and a second limiting boss (32) on opposite sides. One end of the spring (5) is sleeved on the first limiting boss (211), and the other end of the spring (5) is sleeved on the second limiting boss (32).

5. The self-locking pressure gauge connector according to claim 1 or 2, characterized in that: The end plate (21) and the spring seat (3) are respectively provided with a first limiting groove (212) and a second limiting groove (33) at opposite ends. One end of the spring (5) is embedded in the first limiting groove (212), and the other end of the spring (5) is embedded in the second limiting groove (33).

6. The self-locking pressure gauge connector according to claim 1 or 2, characterized in that: Multiple first fluid passages (221) are provided on the side wall of the guide pipe (22), and the multiple first fluid passages (221) are evenly arranged along the circumference of the guide pipe (22).

7. The self-locking pressure gauge connector according to claim 1 or 2, characterized in that: The second hole (13) has a second internal thread (131) on the end of the hole wall away from the retaining ring (11), and the spring seat (3) has a second external thread (34). The spring seat (3) is fixedly connected to the connector body (1) through the cooperation of the second internal thread (131) and the second external thread (34).

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